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Seafloor spreading

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31: 2289: 4736: 5624: 5645: 224: 2049: 4725: 5634: 348:. The Mid-Atlantic Ridge is a slow-spreading center, while the East Pacific Rise is an example of fast spreading. Spreading centers at slow and intermediate rates exhibit a rift valley while at fast rates an axial high is found within the crustal accretion zone. The differences in spreading rates affect not only the geometries of the ridges but also the geochemistry of the basalts that are produced. 292:. As a result, the new sea will evaporate (partially or completely) several times before the elevation of the rift valley has been lowered to the point that the sea becomes stable. During this period of evaporation large evaporite deposits will be made in the rift valley. Later these deposits have the potential to become hydrocarbon seals and are of particular interest to 2284:{\displaystyle {\begin{aligned}\kappa &\sim 8\cdot 10^{-7}\ \mathrm {m} ^{2}\cdot \mathrm {s} ^{-1}\\\alpha &\sim 4\cdot 10^{-5}\ {}^{\circ }\mathrm {C} ^{-1}\\T_{1}&\sim 1220\ {}^{\circ }\mathrm {C} &&{\text{for the Atlantic and Indian oceans}}\\T_{1}&\sim 1120\ {}^{\circ }\mathrm {C} &&{\text{for the eastern Pacific}}\end{aligned}}} 1153: 2406: 831: 181:
towed on the sea surface or from an aircraft. The stripes on one side of the mid-ocean ridge were the mirror image of those on the other side. By identifying a reversal with a known age and measuring the distance of that reversal from the spreading center, the spreading half-rate could be computed.
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As new seafloor forms and spreads apart from the mid-ocean ridge it slowly cools over time. Older seafloor is, therefore, colder than new seafloor, and older oceanic basins deeper than new oceanic basins due to isostasy. If the diameter of the earth remains relatively constant despite the production
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is the weight of the cool, dense, subducting slabs that pull them along, or slab pull. The magmatism at the ridge is considered to be passive upwelling, which is caused by the plates being pulled apart under the weight of their own slabs. This can be thought of as analogous to a rug on a table with
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and is equal to half of the spreading rate). Spreading rates determine if the ridge is fast, intermediate, or slow. As a general rule, fast ridges have spreading (opening) rates of more than 90 mm/year. Intermediate ridges have a spreading rate of 40–90 mm/year while slow spreading ridges
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begins to form between the separating continental fragments. When one of the rifts opens into the existing ocean, the rift system is flooded with seawater and becomes a new sea. The Red Sea is an example of a new arm of the sea. The East African rift was thought to be a failed arm that was opening
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offsets. A spreading center includes a seismically active plate boundary zone a few kilometers to tens of kilometers wide, a crustal accretion zone within the boundary zone where the ocean crust is youngest, and an instantaneous plate boundary - a line within the crustal accretion zone demarcating
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Thus older seafloor deepens more slowly than younger and in fact can be assumed almost constant at ~6400 m depth. Parsons and Sclater concluded that some style of mantle convection must apply heat to the base of the plate everywhere to prevent cooling down below 125 km and lithosphere contraction
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The depth predicted by the square root of seafloor age derived above is too deep for seafloor older than 80 million years. Depth is better explained by a cooling lithosphere plate model rather than the cooling mantle half-space. The plate has a constant temperature at its base and spreading edge.
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first presented a hypothesis of continental drift in 1912, he suggested that continents plowed through the ocean crust. This was impossible: oceanic crust is both more dense and more rigid than continental crust. Accordingly, Wegener's theory wasn't taken very seriously, especially in the United
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The depth of the seafloor (or the height of a location on a mid-ocean ridge above a base-level) is closely correlated with its age (age of the lithosphere where depth is measured). The age-depth relation can be modeled by the cooling of a lithosphere plate or mantle half-space in areas without
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At first the driving force for spreading was argued to be convection currents in the mantle. Since then, it has been shown that the motion of the continents is linked to seafloor spreading by the theory of plate tectonics, which is driven by convection that includes the crust itself as well.
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of new crust, a mechanism must exist by which crust is also destroyed. The destruction of oceanic crust occurs at subduction zones where oceanic crust is forced under either continental crust or oceanic crust. Today, the Atlantic basin is actively spreading at the
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little friction: when part of the rug is off of the table, its weight pulls the rest of the rug down with it. However, the Mid-Atlantic ridge itself is not bordered by plates that are being pulled into subduction zones, except the minor subduction in the
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System today. The process starts by heating at the base of the continental crust which causes it to become more plastic and less dense. Because less dense objects rise in relation to denser objects, the area being heated becomes a broad dome (see
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of Earth's magnetic field was noticed by observing magnetic stripe "anomalies" on the ocean floor. This results in broadly evident "stripes" from which the past magnetic field polarity can be inferred from data gathered with a
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and mantle temperature, due to thermal expansion. The simple result is that the ridge height or ocean depth is proportional to the square root of its age. Oceanic lithosphere is continuously formed at a constant rate at the
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postulated that continents in motion "plowed" through the fixed and immovable seafloor. The idea that the seafloor itself moves and also carries the continents with it as it spreads from a central rift axis was proposed by
2865: 1489: 134:, rather than magma pressure, although there is typically significant magma activity at spreading ridges. Plates that are not subducting are driven by gravity sliding off the elevated mid-ocean ridges a process called 193:
In some locations spreading rates have been found to be asymmetric; the half rates differ on each side of the ridge crest by about five percent. This is thought due to temperature gradients in the asthenosphere from
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is created. The Red Sea has not yet completely split Arabia from Africa, but a similar feature can be found on the other side of Africa that has broken completely free. South America once fit into the area of the
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Since the new oceanic basins are shallower than the old oceanic basins, the total capacity of the world's ocean basins decreases during times of active sea floor spreading. During the opening of the
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Assuming isostatic equilibrium everywhere beneath the cooling plate yields a revised age depth relationship for older sea floor that is approximately correct for ages as young as 20 million years:
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is the rate at which an ocean basin widens due to seafloor spreading. (The rate at which new oceanic lithosphere is added to each tectonic plate on either side of a mid-ocean ridge is the
256:). As the crust bows upward, fractures occur that gradually grow into rifts. The typical rift system consists of three rift arms at approximately 120-degree angles. These areas are named 3801:
Makris, J.; Ginzburg, A. (1987-09-15). "Sedimentary basins within the Dead Sea and other rift zones The Afar Depression: transition between continental rifting and sea-floor spreading".
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Daignieres, Marc; Courtillot, Vincent; Bayer, Roger; Tapponnier, Paul (1975). "A model for the evolution of the axial zone of mid-ocean ridges as suggested by icelandic tectonics".
1148:{\displaystyle {\frac {\partial T}{\partial t}}=\kappa \nabla ^{2}T=\kappa {\frac {\partial ^{2}T}{\partial ^{2}z}}+{\frac {\kappa }{v^{2}}}{\frac {\partial ^{2}T}{\partial ^{2}t}}} 532: 3092: 340:
of the Pacific Ocean. The Pacific is also home to one of the world's most active spreading centers (the East Pacific Rise) with spreading rates of up to 145 ± 4 mm/yr between the
2401:{\displaystyle h(t)\sim {\begin{cases}h_{0}-390{\sqrt {t}}&{\text{for the Atlantic and Indian oceans}}\\h_{0}-350{\sqrt {t}}&{\text{for the eastern Pacific}}\end{cases}}} 683: 2590: 1372: 924: 916: 629: 275:. As the two active rifts continue to open, eventually the continental crust is attenuated as far as it will stretch. At this point basaltic oceanic crust and upper mantle 2728: 580: 1846: 1776: 1741: 1360: 1184: 854: 826:{\displaystyle {\frac {\partial T}{\partial t}}=\kappa \nabla ^{2}T=\kappa {\frac {\partial ^{2}T}{\partial ^{2}z}}+\kappa {\frac {\partial ^{2}T}{\partial ^{2}x'}}} 2617: 2504: 2533: 2477: 288:, September 2005, a 60 km fissure opened as wide as eight meters. During this period of initial flooding the new sea is sensitive to changes in climate and 271:
If spreading continues past the incipient stage described above, two of the rift arms will open while the third arm stops opening and becomes a 'failed rift' or
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are common at spreading centers. Older rocks will be found farther away from the spreading zone while younger rocks will be found nearer to the spreading zone.
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Analysis of depth versus age and depth versus square root of age data allowed Parsons and Sclater to estimate model parameters (for the North Pacific):
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Patriat, Philippe; Achache, José (1984). "India–Eurasia collision chronology has implications for crustal shortening and driving mechanism of plates".
1660:{\displaystyle h(t)=h_{0}+\alpha _{\mathrm {eff} }\int _{0}^{\infty }dz=h_{0}-{\frac {2}{\sqrt {\pi }}}\alpha _{\mathrm {eff} }T_{1}{\sqrt {\kappa t}}} 5364: 2801: 1178:
is large compared to other scales in the problem; therefore the last term in the equation is neglected, giving a 1-dimensional diffusion equation:
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The Ethiopia Afar Geoscientific Lithospheric Experiment (EAGLE): Probing the transition from continental rifting to incipient seafloor spreading
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due to isostasic effect of the change in water column height above the lithosphere as it expands or retracts. Both coefficients are related by:
4199:"The Implications of Terrestrial Heat Flow Observations on Current Tectonic and Geochemical Models of the Crust and Upper Mantle of the Earth" 3913:
Grandin, R.; Socquet, A.; Binet, R.; Klinger, Y.; Jacques, E.; Chabalier, J.-B. de; King, G. C. P.; Lasserre, C.; Tait, S. (2009-08-01).
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Macdonald, K. C. (1982). "Mid-Ocean Ridges: Fine Scale Tectonic, Volcanic and Hydrothermal Processes Within the Plate Boundary Zone".
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Seafloor spreading can stop during the process, but if it continues to the point that the continent is completely severed, then a new
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Sclater, John G.; Anderson, Roger N.; Bell, M. Lee (1971-11-10). "Elevation of ridges and evolution of the central eastern Pacific".
471:, which is assumed large compared to other typical scales in the problem. The temperature at the upper boundary of the lithosphere ( 2876: 2749: 5270: 3109: 4298:
Parsons, Barry; Sclater, John G. (1977-02-10). "An analysis of the variation of ocean floor bathymetry and heat flow with age".
5637: 4685: 4453: 3754:"Emplacement of submarine lava flow fields: A geomorphological model from the Niños eruption at the Galápagos Spreading Center" 102:. In locations where two plates move apart, at mid-ocean ridges, new seafloor is continually formed during seafloor spreading. 215:
the two separating plates. Within the crustal accretion zone is a 1–2 km-wide neovolcanic zone where active volcanism occurs.
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Seafloor spreading occurs at spreading centers, distributed along the crests of mid-ocean ridges. Spreading centers end in
4406: 3224:; Waldhauser, Felix; Wilcock, William S. D. (2016). "Dynamics of a seafloor-spreading episode at the East Pacific Rise". 4807: 1471:
Due to the large velocity, the temperature dependence on the horizontal direction is negligible, and the height at time
5512: 4939: 4827: 5359: 4630: 4068: 3627:"Age, spreading rates, and spreading asymmetry of the world's ocean crust: DIGITAL MODELS OF THE WORLD'S OCEAN CRUST" 3410: 3348: 2625: 1267: 268:. Hess' theory was that new seafloor is formed when magma is forced upward toward the surface at a mid-ocean ridge. 4817: 4777: 17: 5547: 4533: 3914: 5627: 5220: 4399: 1796: 1673: 5670: 211: 3695: 492: 4675: 3915:"September 2005 Manda Hararo-Dabbahu rifting event, Afar (Ethiopia): Constraints provided by geodetic data" 3050: 2953:(seafloor deepening) at older ages. Their plate model also allowed an expression for conductive heat flow, 3126: 91: 4735: 4386: 3434:
Wilson, Douglas S. (1996-10-15). "Fastest known spreading on the Miocene Cocos-Pacific Plate Boundary".
4872: 1460:{\displaystyle T(x',z,t)=T_{1}\cdot \operatorname {erf} \left({\frac {z}{2{\sqrt {\kappa t}}}}\right)} 992:{\displaystyle {\frac {\partial T}{\partial x'}}={\frac {1}{v}}\cdot {\frac {\partial T}{\partial t}}} 5407: 4812: 4772: 2538: 421: 3899: 2324: 412:. In this case the plates are sliding apart over the mantle upwelling in the process of ridge push. 5675: 5537: 4912: 4902: 4842: 4478: 4448: 3106: â€“ Linear feature that exists between two tectonic plates that are moving away from each other 30: 3571:
Weissel, Jeffrey K.; Hayes, Dennis E. (1971). "Asymmetric Seafloor Spreading south of Australia".
633: 5574: 5557: 5394: 4887: 4752: 4690: 4680: 4573: 2693: 487: 356: 1251:{\displaystyle {\frac {\partial T}{\partial t}}=\kappa {\frac {\partial ^{2}T}{\partial ^{2}z}}} 387:
as the plates move away from each other, a phenomenon first observed as continental drift. When
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Dietz, Robert S. (1961). "Continent and Ocean Basin Evolution by Spreading of the Sea Floor".
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have a rate less than 40 mm/year. The highest known rate was over 200 mm/yr during the
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Luyendyk, Bruce P.; Macdonald, Ken C. (1976-06-01). "Spreading center terms and concepts".
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where the height is in meters and time is in millions of years. To get the dependence on
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and can be found in several places across the world today. The separated margins of the
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Macdonald, Ken C. (2019), "Mid-Ocean Ridge Tectonics, Volcanism, and Geomorphology",
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At the Mid-Atlantic Ridge (and in other mid-ocean ridges), material from the upper
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McKenzie, Dan P. (1967-12-15). "Some remarks on heat flow and gravity anomalies".
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is relatively large is equivalent to the assumption that the thermal diffusivity
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Davis, E.E; Lister, C. R. B. (1974). "Fundamentals of Ridge Crest Topography".
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Elsasser, Walter M. (1971-02-10). "Sea-floor spreading as thermal convection".
3848:. Geological Society of America Special Papers. Vol. 478. pp. 51–76. 3469:
Vine, F. J.; Matthews, D. H. (1963). "Magnetic Anomalies Over Oceanic Ridges".
3122: 2860:{\displaystyle \alpha \thicksim 3.2\cdot 10^{-5}\ {}^{\circ }\mathrm {C} ^{-1}} 1363: 388: 364: 352: 265: 236: 66: 4724: 3853: 3626: 34:
Age of oceanic lithosphere; youngest (light colour) is along spreading centers
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MĂĽller, R. Dietmar; Sdrolias, Maria; Gaina, Carmen; Roest, Walter R. (2008).
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By calculating in the frame of reference of the moving lithosphere (velocity
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the research submersible that explored spreading centers in the Atlantic (
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Vine, F. J. (1966-12-16). "Spreading of the Ocean Floor: New Evidence".
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In the mantle half-space model, the seabed height is determined by the
428: 409: 135: 131: 126:. The motivating force for seafloor spreading ridges is tectonic plate 5644: 3951: 3455: 5484: 5346: 5331: 5245: 5090: 4929: 4924: 4707: 4635: 4563: 4483: 4473: 4430: 4140: 3592: 3490: 3190: 3115: 296: 293: 272: 261: 127: 95: 5579: 5301: 5160: 5052: 5042: 4987: 4463: 3716: 1971:{\displaystyle \rho \sim 3.3\ \mathrm {g} \cdot \mathrm {cm} ^{-3}} 281: 253: 3284:"On the Relative Importance of the Driving Forces of Plate Motion" 223: 5448: 5438: 4608: 4578: 2033:{\displaystyle \rho _{0}=1\ \mathrm {g} \cdot \mathrm {cm} ^{-3}} 538:, so that the temperature distribution is constant in time, i.e. 289: 244: 162: 185: 142:
rises up the fractures and cools on the ocean floor to form new
5155: 4568: 3158:. Boulder, CO: Geological Society of America. pp. 599–620. 323: 143: 139: 4016:
DeMets, Charles; Gordon, Richard G.; Argus, Donald F. (2010).
1479:) can be calculated by integrating the thermal expansion over 284:
Afar Geophysical Lithospheric Experiment reported that in the
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Burke, K (1977-05-01). "Aulacogens and Continental Breakup".
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is the mid-ocean ridge height (compared to some reference).
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rises through the faults between oceanic plates to form new
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By substituting the parameters by their rough estimates:
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is different from the usual thermal expansion coefficient
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from the ocean floor, which is approximately constant at
4118: 3624: 448:. The source of the lithosphere has a half-plane shape ( 3696:
10.1130/0091-7613(1976)4<369:sctac>2.0.co;2
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Petrologic studies: a volume to honor A. F. Buddington
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Bastow, Ian D.; Keir, Derek; Daly, Eve (2011-06-01).
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McClinton, J. Timothy; White, Scott M. (2015-03-01).
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more slowly than the other two arms, but in 2005 the
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In the general case, seafloor spreading starts as a
122:, tensional stress causes fractures to occur in the 4245: 3468: 227:Plates in the crust of the earth, according to the 4196: 3086: 3036: 2940: 2859: 2788: 2730:is the depth at the ridge crest, typically 2600 m. 2722: 2682: 2611: 2584: 2527: 2498: 2471: 2400: 2283: 2032: 1970: 1912: 1840: 1820: 1770: 1735: 1697: 1659: 1459: 1354: 1325: 1250: 1170: 1147: 991: 910: 848: 825: 677: 623: 574: 526: 374: 5365:North West Shelf Operational Oceanographic System 4015: 3673: 399:The driver for seafloor spreading in plates with 189:magnetic stripes formed during seafloor spreading 5662: 5355:Deep-ocean Assessment and Reporting of Tsunamis 2683:{\displaystyle d(t)=h_{b}-h_{0}+350{\sqrt {t}}} 98:in the 1960s. The phenomenon is known today as 4297: 4197:Sclater, J. G.; Francheteau, J. (1970-09-01). 4063:. Global Vision Publishing House. p. 83. 3843: 3800: 3751: 1326:{\displaystyle T(t=0)=T_{1}\cdot \Theta (-z).} 57:and then gradually moves away from the ridge. 4407: 3975:Annual Review of Earth and Planetary Sciences 3368:Annual Review of Earth and Planetary Sciences 2933: 2912: 2690:; for the eastern Pacific for example, where 1782:is the ocean width (from mid-ocean ridges to 3570: 3282:Forsyth, Donald; Uyeda, Seiya (1975-10-01). 3281: 1793:The effective thermal expansion coefficient 4347: 4414: 4400: 416:Seafloor global topography: cooling models 4421: 4222: 4041: 3941: 3777: 3650: 3365: 3330: 3307: 2994: 2439:is the distance between the ridge to the 534:. The system is assumed to be at a quasi- 4161: 4083: 1821:{\displaystyle \alpha _{\mathrm {eff} }} 1698:{\displaystyle \alpha _{\mathrm {eff} }} 322: 222: 184: 29: 4056: 434: 14: 5663: 4686:one-dimensional Saint-Venant equations 3433: 3400: 2734: 2450:Rather than height of the ocean floor 527:{\displaystyle T_{1}\cdot \Theta (-z)} 218: 27:Geological process at mid-ocean ridges 4395: 4343: 4341: 4339: 4337: 4293: 4291: 4289: 4287: 4285: 3972: 3620: 3618: 3168: 3087:{\displaystyle q(t)=11.3/{\sqrt {t}}} 5633: 4018:"Geologically current plate motions" 3758:Geochemistry, Geophysics, Geosystems 3631:Geochemistry, Geophysics, Geosystems 3511: 3361: 3359: 3277: 3275: 3273: 3271: 3146: 2443:(roughly half the ocean width), and 4350:Earth and Planetary Science Letters 3995:10.1146/annurev.ea.05.050177.002103 3719:Earth and Planetary Science Letters 3388:10.1146/annurev.ea.10.050182.001103 456:< 0) and a constant temperature 201: 60: 24: 5513:National Oceanographic Data Center 4940:World Ocean Circulation Experiment 4828:Global Ocean Data Analysis Project 4334: 4282: 4224:10.1111/j.1365-246X.1970.tb06089.x 3615: 3341:10.1016/b978-0-12-409548-9.11065-6 3309:10.1111/j.1365-246x.1975.tb00631.x 3112: â€“ Concept in plate tectonics 3021: 3018: 3015: 3000: 2997: 2990: 2987: 2984: 2844: 2782: 2619:measured from the ocean surface): 2354:for the Atlantic and Indian oceans 2265: 2225:for the Atlantic and Indian oceans 2216: 2166: 2106: 2091: 2017: 2014: 2005: 1955: 1952: 1943: 1870: 1867: 1864: 1812: 1809: 1806: 1689: 1686: 1683: 1631: 1628: 1625: 1549: 1533: 1530: 1527: 1305: 1233: 1218: 1199: 1191: 1130: 1115: 1076: 1061: 1039: 1023: 1015: 980: 972: 939: 931: 803: 788: 763: 748: 726: 710: 702: 509: 319:Continued spreading and subduction 25: 5692: 5360:Global Sea Level Observing System 4380: 4203:Geophysical Journal International 4022:Geophysical Journal International 3356: 3288:Geophysical Journal International 3268: 2808: 2763: 2744:~125 km for lithosphere thickness 172:In the 1960s, the past record of 110:Seafloor spreading helps explain 92:U.S. Naval Electronics Laboratory 5643: 5632: 5623: 5622: 4818:Geochemical Ocean Sections Study 4734: 4723: 4043:10.1111/j.1365-246X.2009.04491.x 2479:above a base or reference level 588:), which has spatial coordinate 5548:Ocean thermal energy conversion 5271:Vine–Matthews–Morley hypothesis 4300:Journal of Geophysical Research 4248:Journal of Geophysical Research 4239: 4190: 4164:Journal of Geophysical Research 4155: 4112: 4086:Journal of Geophysical Research 4077: 4050: 4009: 3966: 3922:Journal of Geophysical Research 3906: 3837: 3794: 3745: 3710: 3667: 3564: 3505: 3110:Vine–Matthews–Morley hypothesis 2796:at base and young edge of plate 2585:{\displaystyle d(t)+h(t)=h_{b}} 1790:is the age of the ocean basin. 375:Debate and search for mechanism 355:, sea level was so high that a 105: 4387:Animation of a mid-ocean ridge 3462: 3427: 3394: 3335:, Elsevier, pp. 405–419, 3333:Encyclopedia of Ocean Sciences 3324: 3213: 3162: 3140: 3063: 3057: 2889: 2883: 2638: 2632: 2566: 2560: 2551: 2545: 2522: 2516: 2466: 2460: 2313: 2307: 1582: 1566: 1560: 1554: 1502: 1496: 1402: 1379: 1317: 1308: 1286: 1274: 669: 646: 566: 554: 521: 512: 327:Spreading at a mid-ocean ridge 45:, is a process that occurs at 13: 1: 3534:10.1126/science.154.3755.1405 3147:Hess, H. H. (November 1962). 3133: 1261:with the initial conditions 875:only through the combination 4808:El Niño–Southern Oscillation 4778:Craik–Leibovich vortex force 4534:Luke's variational principle 4370:10.1016/0012-821X(74)90180-0 3823:10.1016/0040-1951(87)90186-7 3739:10.1016/0012-821x(75)90089-8 3436:Geophysical Research Letters 1705:is the effective volumetric 678:{\displaystyle T=T(x',z,t).} 212:overlapping spreading center 7: 5681:Oceanographical terminology 4060:Foundation of Geology Vol 1 3097: 2723:{\displaystyle h_{b}-h_{0}} 860:of the mantle lithosphere. 486:= 0 the temperature is the 198:near the spreading center. 10: 5697: 4873:Ocean dynamical thermostat 4721: 3044:beyond 120 million years: 1475:(i.e. of sea floor of age 419: 5618: 5457: 5431: 5408:Ocean acoustic tomography 5393: 5345: 5284: 5221:MohoroviÄŤić discontinuity 5179: 5051: 4948: 4813:General circulation model 4743: 4449:Benjamin–Feir instability 4429: 3149:"History of Ocean Basins" 2506:, the depth of the ocean 2040:is the density of water. 575:{\displaystyle T=T(x,z).} 422:Seafloor depth versus age 138:. At a spreading center, 5538:Ocean surface topography 4913:Thermohaline circulation 4903:Subsurface ocean current 4843:Hydrothermal circulation 4676:Wave–current interaction 4454:Boussinesq approximation 2535:is of interest. Because 2447:is the ocean basin age. 1978:is the rock density and 911:{\displaystyle x=x'+vt,} 624:{\displaystyle x'=x-vt,} 5575:Sea surface temperature 5558:Outline of oceanography 4753:Atmospheric circulation 4691:shallow water equations 4681:Waves and shallow water 4574:Significant wave height 4362:1974E&PSL..21..405D 4320:10.1029/jb082i005p00803 4268:10.1029/jb076i032p07888 4184:10.1029/JZ072i024p06261 4106:10.1029/JB076i005p01101 3731:1975E&PSL..26..222D 3405:. New York: Cambridge. 2388:for the eastern Pacific 2274:for the eastern Pacific 1841:{\displaystyle \alpha } 1771:{\displaystyle L^{2}/A} 1736:{\displaystyle \kappa } 1355:{\displaystyle z\leq 0} 849:{\displaystyle \kappa } 488:Heaviside step function 357:Western Interior Seaway 5570:Sea surface microlayer 4935:Wind generated current 4057:Bhagwat, S.B. (2009). 3401:Searle, Roger (2013). 3125:) and Pacific Oceans ( 3088: 3038: 2942: 2861: 2790: 2724: 2684: 2613: 2586: 2529: 2500: 2473: 2415:, one must substitute 2402: 2285: 2034: 1972: 1914: 1842: 1822: 1772: 1737: 1699: 1661: 1461: 1356: 1327: 1252: 1172: 1149: 993: 912: 850: 827: 679: 625: 576: 528: 328: 232: 190: 118:. When oceanic plates 35: 5403:Deep scattering layer 5385:World Geodetic System 4893:Princeton Ocean Model 4773:Coriolis–Stokes force 4423:Physical oceanography 3854:10.1130/2011.2478(04) 3089: 3039: 2943: 2862: 2791: 2725: 2685: 2614: 2612:{\displaystyle h_{b}} 2587: 2530: 2501: 2499:{\displaystyle h_{b}} 2474: 2403: 2286: 2035: 1973: 1915: 1843: 1823: 1773: 1743:is small compared to 1738: 1700: 1662: 1462: 1357: 1328: 1253: 1173: 1150: 994: 913: 851: 828: 680: 626: 577: 529: 326: 241:continental land mass 226: 188: 174:geomagnetic reversals 33: 5671:Geological processes 5423:Underwater acoustics 4983:Perigean spring tide 4848:Langmuir circulation 4559:Rossby-gravity waves 3943:10.1029/2008jb005843 3779:10.1002/2014gc005632 3652:10.1029/2007GC001743 3051: 2961: 2877: 2802: 2750: 2694: 2626: 2596: 2539: 2528:{\displaystyle d(t)} 2510: 2483: 2472:{\displaystyle h(t)} 2454: 2301: 2050: 1982: 1927: 1855: 1832: 1797: 1747: 1727: 1719:The assumption that 1674: 1490: 1373: 1340: 1268: 1185: 1162: 1009: 925: 879: 840: 696: 634: 592: 542: 493: 435:Cooling mantle model 84:Princeton University 65:Earlier theories by 5585:Science On a Sphere 5191:Convergent boundary 4863:Modular Ocean Model 4823:Geostrophic current 4539:Mild-slope equation 4312:1977JGR....82..803P 4260:1971JGR....76.7888S 4215:1970GeoJ...20..509S 4176:1967JGR....72.6261M 4133:1984Natur.311..615P 4098:1971JGR....76.1101E 4034:2010GeoJI.181....1D 3987:1977AREPS...5..371B 3934:2009JGRB..114.8404G 3815:1987Tectp.141..199M 3770:2015GGG....16..899M 3688:1976Geo.....4..369L 3643:2008GGG.....9.4006M 3585:1971Natur.231..518W 3526:1966Sci...154.1405V 3520:(3755): 1405–1415. 3483:1963Natur.199..947V 3448:1996GeoRL..23.3003W 3380:1982AREPS..10..155M 3300:1975GeoJ...43..163F 3246:10.1038/nature20116 3238:2016Natur.540..261T 3183:1961Natur.190..854D 2735:Cooling plate model 1553: 1158:It is assumed that 858:thermal diffusivity 475:= 0) is a constant 441:oceanic lithosphere 219:Incipient spreading 158:spreading half-rate 80:Harold Hammond Hess 5241:Seafloor spreading 5231:Outer trench swell 5196:Divergent boundary 5096:Continental margin 5081:Carbonate platform 4978:Lunitidal interval 3104:Divergent boundary 3084: 3034: 2938: 2857: 2786: 2720: 2680: 2609: 2582: 2525: 2496: 2469: 2398: 2393: 2281: 2279: 2030: 1968: 1910: 1838: 1818: 1768: 1733: 1695: 1657: 1539: 1457: 1352: 1323: 1248: 1168: 1145: 989: 908: 846: 823: 675: 621: 572: 524: 334:Mid-Atlantic Ridge 329: 233: 191: 148:Hydrothermal vents 53:is formed through 39:Seafloor spreading 36: 5658: 5657: 5650:Oceans portal 5610:World Ocean Atlas 5600:Underwater glider 5543:Ocean temperature 5206:Hydrothermal vent 5171:Submarine volcano 5106:Continental shelf 5086:Coastal geography 5076:Bathymetric chart 4958:Amphidromic point 4646:Wave nonlinearity 4504:Infragravity wave 4254:(32): 7888–7915. 4170:(24): 6261–6273. 3871:978-0-8137-2478-2 3579:(5304): 518–522. 3477:(4897): 947–949. 3456:10.1029/96GL02893 3442:(21): 3003–3006. 3232:(7632): 261–265. 3177:(4779): 854–857. 3082: 2832: 2771: 2678: 2441:continental shelf 2389: 2382: 2355: 2348: 2275: 2254: 2226: 2205: 2154: 2088: 2003: 1941: 1908: 1784:continental shelf 1709:coefficient, and 1707:thermal expansion 1655: 1617: 1616: 1451: 1448: 1336:The solution for 1246: 1206: 1171:{\displaystyle v} 1143: 1109: 1089: 1030: 987: 964: 951: 821: 776: 717: 243:, similar to the 167:East Pacific Rise 114:in the theory of 112:continental drift 75:continental drift 71:Alexander du Toit 55:volcanic activity 16:(Redirected from 5688: 5648: 5647: 5636: 5635: 5626: 5625: 5565:Pelagic sediment 5503:Marine pollution 5297:Deep ocean water 5166:Submarine canyon 5101:Continental rise 4993:Rule of twelfths 4908:Sverdrup balance 4838:Humboldt Current 4763:Boundary current 4738: 4727: 4544:Radiation stress 4514:Iribarren number 4489:Equatorial waves 4444:Ballantine scale 4439:Airy wave theory 4416: 4409: 4402: 4393: 4392: 4374: 4373: 4345: 4332: 4331: 4295: 4280: 4279: 4243: 4237: 4236: 4226: 4194: 4188: 4187: 4159: 4153: 4152: 4141:10.1038/311615a0 4116: 4110: 4109: 4092:(5): 1101–1112. 4081: 4075: 4074: 4054: 4048: 4047: 4045: 4013: 4007: 4006: 3970: 3964: 3963: 3945: 3919: 3910: 3904: 3903: 3897: 3893: 3891: 3883: 3841: 3835: 3834: 3798: 3792: 3791: 3781: 3749: 3743: 3742: 3714: 3708: 3707: 3671: 3665: 3664: 3654: 3622: 3613: 3612: 3593:10.1038/231518a0 3568: 3562: 3561: 3509: 3503: 3502: 3491:10.1038/199947a0 3466: 3460: 3459: 3431: 3425: 3424: 3403:Mid-ocean ridges 3398: 3392: 3391: 3363: 3354: 3353: 3328: 3322: 3321: 3311: 3279: 3266: 3265: 3217: 3211: 3210: 3191:10.1038/190854a0 3166: 3160: 3159: 3153: 3144: 3093: 3091: 3090: 3085: 3083: 3078: 3076: 3043: 3041: 3040: 3035: 3033: 3032: 3024: 3012: 3011: 3003: 2993: 2982: 2981: 2947: 2945: 2944: 2939: 2937: 2936: 2927: 2916: 2915: 2866: 2864: 2863: 2858: 2856: 2855: 2847: 2841: 2840: 2835: 2830: 2829: 2828: 2795: 2793: 2792: 2787: 2785: 2780: 2779: 2774: 2769: 2762: 2761: 2729: 2727: 2726: 2721: 2719: 2718: 2706: 2705: 2689: 2687: 2686: 2681: 2679: 2674: 2666: 2665: 2653: 2652: 2618: 2616: 2615: 2610: 2608: 2607: 2591: 2589: 2588: 2583: 2581: 2580: 2534: 2532: 2531: 2526: 2505: 2503: 2502: 2497: 2495: 2494: 2478: 2476: 2475: 2470: 2407: 2405: 2404: 2399: 2397: 2396: 2390: 2387: 2383: 2378: 2370: 2369: 2356: 2353: 2349: 2344: 2336: 2335: 2290: 2288: 2287: 2282: 2280: 2276: 2273: 2270: 2268: 2263: 2262: 2257: 2252: 2241: 2240: 2227: 2224: 2221: 2219: 2214: 2213: 2208: 2203: 2192: 2191: 2178: 2177: 2169: 2163: 2162: 2157: 2152: 2151: 2150: 2118: 2117: 2109: 2100: 2099: 2094: 2086: 2085: 2084: 2039: 2037: 2036: 2031: 2029: 2028: 2020: 2008: 2001: 1994: 1993: 1977: 1975: 1974: 1969: 1967: 1966: 1958: 1946: 1939: 1919: 1917: 1916: 1911: 1909: 1907: 1906: 1905: 1886: 1875: 1874: 1873: 1847: 1845: 1844: 1839: 1827: 1825: 1824: 1819: 1817: 1816: 1815: 1777: 1775: 1774: 1769: 1764: 1759: 1758: 1742: 1740: 1739: 1734: 1704: 1702: 1701: 1696: 1694: 1693: 1692: 1666: 1664: 1663: 1658: 1656: 1648: 1646: 1645: 1636: 1635: 1634: 1618: 1612: 1608: 1603: 1602: 1581: 1580: 1552: 1547: 1538: 1537: 1536: 1517: 1516: 1466: 1464: 1463: 1458: 1456: 1452: 1450: 1449: 1441: 1432: 1417: 1416: 1389: 1362:is given by the 1361: 1359: 1358: 1353: 1332: 1330: 1329: 1324: 1301: 1300: 1257: 1255: 1254: 1249: 1247: 1245: 1241: 1240: 1230: 1226: 1225: 1215: 1207: 1205: 1197: 1189: 1177: 1175: 1174: 1169: 1154: 1152: 1151: 1146: 1144: 1142: 1138: 1137: 1127: 1123: 1122: 1112: 1110: 1108: 1107: 1095: 1090: 1088: 1084: 1083: 1073: 1069: 1068: 1058: 1047: 1046: 1031: 1029: 1021: 1013: 998: 996: 995: 990: 988: 986: 978: 970: 965: 957: 952: 950: 949: 937: 929: 917: 915: 914: 909: 895: 855: 853: 852: 847: 832: 830: 829: 824: 822: 820: 819: 811: 810: 800: 796: 795: 785: 777: 775: 771: 770: 760: 756: 755: 745: 734: 733: 718: 716: 708: 700: 684: 682: 681: 676: 656: 630: 628: 627: 622: 602: 581: 579: 578: 573: 533: 531: 530: 525: 505: 504: 446:mid-ocean ridges 258:triple junctions 249:East Africa Rift 208:transform faults 202:Spreading center 132:subduction zones 61:History of study 47:mid-ocean ridges 21: 18:Spreading center 5696: 5695: 5691: 5690: 5689: 5687: 5686: 5685: 5676:Plate tectonics 5661: 5660: 5659: 5654: 5642: 5614: 5453: 5427: 5389: 5370:Sea-level curve 5341: 5280: 5266:Transform fault 5216:Mid-ocean ridge 5182: 5175: 5141:Oceanic plateau 5047: 5033:Tidal resonance 5003:Theory of tides 4944: 4853:Longshore drift 4803:Ekman transport 4739: 4733: 4732: 4731: 4730: 4729: 4728: 4719: 4671:Wave turbulence 4604:Trochoidal wave 4529:Longshore drift 4425: 4420: 4383: 4378: 4377: 4346: 4335: 4296: 4283: 4244: 4240: 4195: 4191: 4160: 4156: 4117: 4113: 4082: 4078: 4071: 4055: 4051: 4014: 4010: 3971: 3967: 3917: 3911: 3907: 3895: 3894: 3885: 3884: 3872: 3842: 3838: 3799: 3795: 3750: 3746: 3715: 3711: 3672: 3668: 3623: 3616: 3569: 3565: 3510: 3506: 3467: 3463: 3432: 3428: 3413: 3399: 3395: 3364: 3357: 3351: 3329: 3325: 3280: 3269: 3218: 3214: 3167: 3163: 3151: 3145: 3141: 3136: 3100: 3077: 3072: 3052: 3049: 3048: 3025: 3014: 3013: 3004: 2996: 2995: 2983: 2974: 2970: 2962: 2959: 2958: 2932: 2931: 2923: 2911: 2910: 2878: 2875: 2874: 2848: 2843: 2842: 2836: 2834: 2833: 2821: 2817: 2803: 2800: 2799: 2781: 2775: 2773: 2772: 2757: 2753: 2751: 2748: 2747: 2737: 2714: 2710: 2701: 2697: 2695: 2692: 2691: 2673: 2661: 2657: 2648: 2644: 2627: 2624: 2623: 2603: 2599: 2597: 2594: 2593: 2576: 2572: 2540: 2537: 2536: 2511: 2508: 2507: 2490: 2486: 2484: 2481: 2480: 2455: 2452: 2451: 2392: 2391: 2386: 2384: 2377: 2365: 2361: 2358: 2357: 2352: 2350: 2343: 2331: 2327: 2320: 2319: 2302: 2299: 2298: 2278: 2277: 2272: 2269: 2264: 2258: 2256: 2255: 2242: 2236: 2232: 2229: 2228: 2223: 2220: 2215: 2209: 2207: 2206: 2193: 2187: 2183: 2180: 2179: 2170: 2165: 2164: 2158: 2156: 2155: 2143: 2139: 2126: 2120: 2119: 2110: 2105: 2104: 2095: 2090: 2089: 2077: 2073: 2060: 2053: 2051: 2048: 2047: 2021: 2013: 2012: 2004: 1989: 1985: 1983: 1980: 1979: 1959: 1951: 1950: 1942: 1928: 1925: 1924: 1901: 1897: 1890: 1885: 1863: 1862: 1858: 1856: 1853: 1852: 1833: 1830: 1829: 1805: 1804: 1800: 1798: 1795: 1794: 1760: 1754: 1750: 1748: 1745: 1744: 1728: 1725: 1724: 1714: 1682: 1681: 1677: 1675: 1672: 1671: 1647: 1641: 1637: 1624: 1623: 1619: 1607: 1598: 1594: 1576: 1572: 1548: 1543: 1526: 1525: 1521: 1512: 1508: 1491: 1488: 1487: 1440: 1436: 1431: 1427: 1412: 1408: 1382: 1374: 1371: 1370: 1341: 1338: 1337: 1296: 1292: 1269: 1266: 1265: 1236: 1232: 1231: 1221: 1217: 1216: 1214: 1198: 1190: 1188: 1186: 1183: 1182: 1163: 1160: 1159: 1133: 1129: 1128: 1118: 1114: 1113: 1111: 1103: 1099: 1094: 1079: 1075: 1074: 1064: 1060: 1059: 1057: 1042: 1038: 1022: 1014: 1012: 1010: 1007: 1006: 979: 971: 969: 956: 942: 938: 930: 928: 926: 923: 922: 888: 880: 877: 876: 841: 838: 837: 812: 806: 802: 801: 791: 787: 786: 784: 766: 762: 761: 751: 747: 746: 744: 729: 725: 709: 701: 699: 697: 694: 693: 649: 635: 632: 631: 595: 593: 590: 589: 543: 540: 539: 500: 496: 494: 491: 490: 481: 462: 437: 424: 418: 406:Lesser Antilles 377: 321: 313:triple junction 266:passive margins 264:evolve to form 229:plate tectonics 221: 204: 116:plate tectonics 108: 100:plate tectonics 63: 43:seafloor spread 28: 23: 22: 15: 12: 11: 5: 5694: 5684: 5683: 5678: 5673: 5656: 5655: 5653: 5652: 5640: 5630: 5619: 5616: 5615: 5613: 5612: 5607: 5602: 5597: 5592: 5590:Stratification 5587: 5582: 5577: 5572: 5567: 5562: 5561: 5560: 5550: 5545: 5540: 5535: 5530: 5525: 5520: 5515: 5510: 5505: 5500: 5495: 5490: 5482: 5480:Color of water 5477: 5475:Benthic lander 5472: 5467: 5461: 5459: 5455: 5454: 5452: 5451: 5446: 5441: 5435: 5433: 5429: 5428: 5426: 5425: 5420: 5415: 5410: 5405: 5399: 5397: 5391: 5390: 5388: 5387: 5382: 5380:Sea level rise 5377: 5375:Sea level drop 5372: 5367: 5362: 5357: 5351: 5349: 5343: 5342: 5340: 5339: 5334: 5329: 5324: 5319: 5314: 5309: 5304: 5299: 5294: 5288: 5286: 5282: 5281: 5279: 5278: 5273: 5268: 5263: 5258: 5253: 5248: 5243: 5238: 5233: 5228: 5223: 5218: 5213: 5211:Marine geology 5208: 5203: 5198: 5193: 5187: 5185: 5177: 5176: 5174: 5173: 5168: 5163: 5158: 5153: 5151:Passive margin 5148: 5146:Oceanic trench 5143: 5138: 5133: 5128: 5123: 5118: 5113: 5108: 5103: 5098: 5093: 5088: 5083: 5078: 5073: 5068: 5063: 5057: 5055: 5049: 5048: 5046: 5045: 5040: 5035: 5030: 5025: 5020: 5015: 5010: 5005: 5000: 4995: 4990: 4985: 4980: 4975: 4970: 4965: 4960: 4954: 4952: 4946: 4945: 4943: 4942: 4937: 4932: 4927: 4922: 4921: 4920: 4910: 4905: 4900: 4895: 4890: 4885: 4880: 4878:Ocean dynamics 4875: 4870: 4865: 4860: 4855: 4850: 4845: 4840: 4835: 4830: 4825: 4820: 4815: 4810: 4805: 4800: 4795: 4790: 4785: 4780: 4775: 4770: 4768:Coriolis force 4765: 4760: 4755: 4749: 4747: 4741: 4740: 4722: 4720: 4718: 4717: 4716: 4715: 4705: 4700: 4695: 4694: 4693: 4688: 4678: 4673: 4668: 4663: 4658: 4653: 4648: 4643: 4638: 4633: 4628: 4623: 4618: 4617: 4616: 4606: 4601: 4596: 4591: 4589:Stokes problem 4586: 4581: 4576: 4571: 4566: 4561: 4556: 4551: 4546: 4541: 4536: 4531: 4526: 4524:Kinematic wave 4521: 4516: 4511: 4506: 4501: 4496: 4491: 4486: 4481: 4476: 4471: 4466: 4461: 4456: 4451: 4446: 4441: 4435: 4433: 4427: 4426: 4419: 4418: 4411: 4404: 4396: 4390: 4389: 4382: 4381:External links 4379: 4376: 4375: 4356:(4): 405–413. 4333: 4306:(5): 803–827. 4281: 4238: 4209:(5): 509–542. 4189: 4154: 4111: 4076: 4069: 4049: 4008: 3981:(1): 371–396. 3965: 3928:(B8): B08404. 3905: 3896:|journal= 3870: 3836: 3809:(1): 199–214. 3803:Tectonophysics 3793: 3764:(3): 899–911. 3744: 3725:(2): 222–232. 3709: 3666: 3614: 3563: 3504: 3461: 3426: 3411: 3393: 3374:(1): 155–190. 3355: 3349: 3323: 3294:(1): 163–200. 3267: 3220:Tan, Yen Joe; 3212: 3161: 3138: 3137: 3135: 3132: 3131: 3130: 3123:Project FAMOUS 3113: 3107: 3099: 3096: 3095: 3094: 3081: 3075: 3071: 3068: 3065: 3062: 3059: 3056: 3031: 3028: 3023: 3020: 3017: 3010: 3007: 3002: 2999: 2992: 2989: 2986: 2980: 2977: 2973: 2969: 2966: 2950: 2949: 2935: 2930: 2926: 2922: 2919: 2914: 2909: 2906: 2903: 2900: 2897: 2894: 2891: 2888: 2885: 2882: 2868: 2867: 2854: 2851: 2846: 2839: 2827: 2824: 2820: 2816: 2813: 2810: 2807: 2797: 2784: 2778: 2768: 2765: 2760: 2756: 2745: 2736: 2733: 2732: 2731: 2717: 2713: 2709: 2704: 2700: 2677: 2672: 2669: 2664: 2660: 2656: 2651: 2647: 2643: 2640: 2637: 2634: 2631: 2606: 2602: 2579: 2575: 2571: 2568: 2565: 2562: 2559: 2556: 2553: 2550: 2547: 2544: 2524: 2521: 2518: 2515: 2493: 2489: 2468: 2465: 2462: 2459: 2409: 2408: 2395: 2385: 2381: 2376: 2373: 2368: 2364: 2360: 2359: 2351: 2347: 2342: 2339: 2334: 2330: 2326: 2325: 2323: 2318: 2315: 2312: 2309: 2306: 2292: 2291: 2271: 2267: 2261: 2251: 2248: 2245: 2243: 2239: 2235: 2231: 2230: 2222: 2218: 2212: 2202: 2199: 2196: 2194: 2190: 2186: 2182: 2181: 2176: 2173: 2168: 2161: 2149: 2146: 2142: 2138: 2135: 2132: 2129: 2127: 2125: 2122: 2121: 2116: 2113: 2108: 2103: 2098: 2093: 2083: 2080: 2076: 2072: 2069: 2066: 2063: 2061: 2059: 2056: 2055: 2027: 2024: 2019: 2016: 2011: 2007: 2000: 1997: 1992: 1988: 1965: 1962: 1957: 1954: 1949: 1945: 1938: 1935: 1932: 1921: 1920: 1904: 1900: 1896: 1893: 1889: 1884: 1881: 1878: 1872: 1869: 1866: 1861: 1837: 1814: 1811: 1808: 1803: 1767: 1763: 1757: 1753: 1732: 1712: 1691: 1688: 1685: 1680: 1668: 1667: 1654: 1651: 1644: 1640: 1633: 1630: 1627: 1622: 1615: 1611: 1606: 1601: 1597: 1593: 1590: 1587: 1584: 1579: 1575: 1571: 1568: 1565: 1562: 1559: 1556: 1551: 1546: 1542: 1535: 1532: 1529: 1524: 1520: 1515: 1511: 1507: 1504: 1501: 1498: 1495: 1469: 1468: 1455: 1447: 1444: 1439: 1435: 1430: 1426: 1423: 1420: 1415: 1411: 1407: 1404: 1401: 1398: 1395: 1392: 1388: 1385: 1381: 1378: 1364:error function 1351: 1348: 1345: 1334: 1333: 1322: 1319: 1316: 1313: 1310: 1307: 1304: 1299: 1295: 1291: 1288: 1285: 1282: 1279: 1276: 1273: 1259: 1258: 1244: 1239: 1235: 1229: 1224: 1220: 1213: 1210: 1204: 1201: 1196: 1193: 1167: 1156: 1155: 1141: 1136: 1132: 1126: 1121: 1117: 1106: 1102: 1098: 1093: 1087: 1082: 1078: 1072: 1067: 1063: 1056: 1053: 1050: 1045: 1041: 1037: 1034: 1028: 1025: 1020: 1017: 1000: 999: 985: 982: 977: 974: 968: 963: 960: 955: 948: 945: 941: 936: 933: 907: 904: 901: 898: 894: 891: 887: 884: 845: 834: 833: 818: 815: 809: 805: 799: 794: 790: 783: 780: 774: 769: 765: 759: 754: 750: 743: 740: 737: 732: 728: 724: 721: 715: 712: 707: 704: 674: 671: 668: 665: 662: 659: 655: 652: 648: 645: 642: 639: 620: 617: 614: 611: 608: 605: 601: 598: 571: 568: 565: 562: 559: 556: 553: 550: 547: 523: 520: 517: 514: 511: 508: 503: 499: 479: 460: 436: 433: 417: 414: 401:active margins 389:Alfred Wegener 376: 373: 365:Gulf of Mexico 359:formed across 353:Atlantic Ocean 320: 317: 220: 217: 203: 200: 154:Spreading rate 140:basaltic magma 107: 104: 67:Alfred Wegener 62: 59: 26: 9: 6: 4: 3: 2: 5693: 5682: 5679: 5677: 5674: 5672: 5669: 5668: 5666: 5651: 5646: 5641: 5639: 5631: 5629: 5621: 5620: 5617: 5611: 5608: 5606: 5603: 5601: 5598: 5596: 5593: 5591: 5588: 5586: 5583: 5581: 5578: 5576: 5573: 5571: 5568: 5566: 5563: 5559: 5556: 5555: 5554: 5551: 5549: 5546: 5544: 5541: 5539: 5536: 5534: 5531: 5529: 5526: 5524: 5521: 5519: 5516: 5514: 5511: 5509: 5506: 5504: 5501: 5499: 5498:Marine energy 5496: 5494: 5491: 5489: 5488: 5483: 5481: 5478: 5476: 5473: 5471: 5468: 5466: 5465:Acidification 5463: 5462: 5460: 5456: 5450: 5447: 5445: 5442: 5440: 5437: 5436: 5434: 5430: 5424: 5421: 5419: 5418:SOFAR channel 5416: 5414: 5411: 5409: 5406: 5404: 5401: 5400: 5398: 5396: 5392: 5386: 5383: 5381: 5378: 5376: 5373: 5371: 5368: 5366: 5363: 5361: 5358: 5356: 5353: 5352: 5350: 5348: 5344: 5338: 5335: 5333: 5330: 5328: 5325: 5323: 5320: 5318: 5315: 5313: 5310: 5308: 5305: 5303: 5300: 5298: 5295: 5293: 5290: 5289: 5287: 5283: 5277: 5274: 5272: 5269: 5267: 5264: 5262: 5259: 5257: 5254: 5252: 5249: 5247: 5244: 5242: 5239: 5237: 5234: 5232: 5229: 5227: 5226:Oceanic crust 5224: 5222: 5219: 5217: 5214: 5212: 5209: 5207: 5204: 5202: 5201:Fracture zone 5199: 5197: 5194: 5192: 5189: 5188: 5186: 5184: 5178: 5172: 5169: 5167: 5164: 5162: 5159: 5157: 5154: 5152: 5149: 5147: 5144: 5142: 5139: 5137: 5136:Oceanic basin 5134: 5132: 5129: 5127: 5124: 5122: 5119: 5117: 5114: 5112: 5109: 5107: 5104: 5102: 5099: 5097: 5094: 5092: 5089: 5087: 5084: 5082: 5079: 5077: 5074: 5072: 5069: 5067: 5066:Abyssal plain 5064: 5062: 5059: 5058: 5056: 5054: 5050: 5044: 5041: 5039: 5036: 5034: 5031: 5029: 5026: 5024: 5021: 5019: 5016: 5014: 5011: 5009: 5006: 5004: 5001: 4999: 4996: 4994: 4991: 4989: 4986: 4984: 4981: 4979: 4976: 4974: 4973:Internal tide 4971: 4969: 4966: 4964: 4961: 4959: 4956: 4955: 4953: 4951: 4947: 4941: 4938: 4936: 4933: 4931: 4928: 4926: 4923: 4919: 4916: 4915: 4914: 4911: 4909: 4906: 4904: 4901: 4899: 4896: 4894: 4891: 4889: 4886: 4884: 4881: 4879: 4876: 4874: 4871: 4869: 4868:Ocean current 4866: 4864: 4861: 4859: 4856: 4854: 4851: 4849: 4846: 4844: 4841: 4839: 4836: 4834: 4831: 4829: 4826: 4824: 4821: 4819: 4816: 4814: 4811: 4809: 4806: 4804: 4801: 4799: 4796: 4794: 4791: 4789: 4786: 4784: 4781: 4779: 4776: 4774: 4771: 4769: 4766: 4764: 4761: 4759: 4756: 4754: 4751: 4750: 4748: 4746: 4742: 4737: 4726: 4714: 4711: 4710: 4709: 4706: 4704: 4701: 4699: 4696: 4692: 4689: 4687: 4684: 4683: 4682: 4679: 4677: 4674: 4672: 4669: 4667: 4666:Wave shoaling 4664: 4662: 4659: 4657: 4654: 4652: 4649: 4647: 4644: 4642: 4639: 4637: 4634: 4632: 4629: 4627: 4626:Ursell number 4624: 4622: 4619: 4615: 4612: 4611: 4610: 4607: 4605: 4602: 4600: 4597: 4595: 4592: 4590: 4587: 4585: 4582: 4580: 4577: 4575: 4572: 4570: 4567: 4565: 4562: 4560: 4557: 4555: 4552: 4550: 4547: 4545: 4542: 4540: 4537: 4535: 4532: 4530: 4527: 4525: 4522: 4520: 4517: 4515: 4512: 4510: 4509:Internal wave 4507: 4505: 4502: 4500: 4497: 4495: 4492: 4490: 4487: 4485: 4482: 4480: 4477: 4475: 4472: 4470: 4467: 4465: 4462: 4460: 4459:Breaking wave 4457: 4455: 4452: 4450: 4447: 4445: 4442: 4440: 4437: 4436: 4434: 4432: 4428: 4424: 4417: 4412: 4410: 4405: 4403: 4398: 4397: 4394: 4388: 4385: 4384: 4371: 4367: 4363: 4359: 4355: 4351: 4344: 4342: 4340: 4338: 4329: 4325: 4321: 4317: 4313: 4309: 4305: 4301: 4294: 4292: 4290: 4288: 4286: 4277: 4273: 4269: 4265: 4261: 4257: 4253: 4249: 4242: 4234: 4230: 4225: 4220: 4216: 4212: 4208: 4204: 4200: 4193: 4185: 4181: 4177: 4173: 4169: 4165: 4158: 4150: 4146: 4142: 4138: 4134: 4130: 4127:(5987): 615. 4126: 4122: 4115: 4107: 4103: 4099: 4095: 4091: 4087: 4080: 4072: 4070:9788182202764 4066: 4062: 4061: 4053: 4044: 4039: 4035: 4031: 4027: 4023: 4019: 4012: 4004: 4000: 3996: 3992: 3988: 3984: 3980: 3976: 3969: 3961: 3957: 3953: 3949: 3944: 3939: 3935: 3931: 3927: 3923: 3916: 3909: 3901: 3889: 3881: 3877: 3873: 3867: 3863: 3859: 3855: 3851: 3847: 3840: 3832: 3828: 3824: 3820: 3816: 3812: 3808: 3804: 3797: 3789: 3785: 3780: 3775: 3771: 3767: 3763: 3759: 3755: 3748: 3740: 3736: 3732: 3728: 3724: 3720: 3713: 3705: 3701: 3697: 3693: 3689: 3685: 3681: 3677: 3670: 3662: 3658: 3653: 3648: 3644: 3640: 3636: 3632: 3628: 3621: 3619: 3610: 3606: 3602: 3598: 3594: 3590: 3586: 3582: 3578: 3574: 3567: 3559: 3555: 3551: 3547: 3543: 3539: 3535: 3531: 3527: 3523: 3519: 3515: 3508: 3500: 3496: 3492: 3488: 3484: 3480: 3476: 3472: 3465: 3457: 3453: 3449: 3445: 3441: 3437: 3430: 3422: 3418: 3414: 3412:9781107017528 3408: 3404: 3397: 3389: 3385: 3381: 3377: 3373: 3369: 3362: 3360: 3352: 3350:9780128130827 3346: 3342: 3338: 3334: 3327: 3319: 3315: 3310: 3305: 3301: 3297: 3293: 3289: 3285: 3278: 3276: 3274: 3272: 3263: 3259: 3255: 3251: 3247: 3243: 3239: 3235: 3231: 3227: 3223: 3222:Tolstoy, Maya 3216: 3208: 3204: 3200: 3196: 3192: 3188: 3184: 3180: 3176: 3172: 3165: 3157: 3150: 3143: 3139: 3128: 3124: 3120: 3119: 3114: 3111: 3108: 3105: 3102: 3101: 3079: 3073: 3069: 3066: 3060: 3054: 3047: 3046: 3045: 3029: 3026: 3008: 3005: 2978: 2975: 2971: 2967: 2964: 2956: 2928: 2924: 2920: 2917: 2907: 2904: 2901: 2898: 2895: 2892: 2886: 2880: 2873: 2872: 2871: 2852: 2849: 2837: 2825: 2822: 2818: 2814: 2811: 2805: 2798: 2776: 2766: 2758: 2754: 2746: 2743: 2742: 2741: 2715: 2711: 2707: 2702: 2698: 2675: 2670: 2667: 2662: 2658: 2654: 2649: 2645: 2641: 2635: 2629: 2622: 2621: 2620: 2604: 2600: 2577: 2573: 2569: 2563: 2557: 2554: 2548: 2542: 2519: 2513: 2491: 2487: 2463: 2457: 2448: 2446: 2442: 2438: 2434: 2430: 2426: 2422: 2418: 2414: 2379: 2374: 2371: 2366: 2362: 2345: 2340: 2337: 2332: 2328: 2321: 2316: 2310: 2304: 2297: 2296: 2295: 2259: 2249: 2246: 2244: 2237: 2233: 2210: 2200: 2197: 2195: 2188: 2184: 2174: 2171: 2159: 2147: 2144: 2140: 2136: 2133: 2130: 2128: 2123: 2114: 2111: 2101: 2096: 2081: 2078: 2074: 2070: 2067: 2064: 2062: 2057: 2046: 2045: 2044: 2041: 2025: 2022: 2009: 1998: 1995: 1990: 1986: 1963: 1960: 1947: 1936: 1933: 1930: 1902: 1898: 1894: 1891: 1887: 1882: 1879: 1876: 1859: 1851: 1850: 1849: 1835: 1801: 1791: 1789: 1785: 1781: 1765: 1761: 1755: 1751: 1730: 1722: 1717: 1715: 1708: 1678: 1652: 1649: 1642: 1638: 1620: 1613: 1609: 1604: 1599: 1595: 1591: 1588: 1585: 1577: 1573: 1569: 1563: 1557: 1544: 1540: 1522: 1518: 1513: 1509: 1505: 1499: 1493: 1486: 1485: 1484: 1482: 1478: 1474: 1453: 1445: 1442: 1437: 1433: 1428: 1424: 1421: 1418: 1413: 1409: 1405: 1399: 1396: 1393: 1390: 1386: 1383: 1376: 1369: 1368: 1367: 1365: 1349: 1346: 1343: 1320: 1314: 1311: 1302: 1297: 1293: 1289: 1283: 1280: 1277: 1271: 1264: 1263: 1262: 1242: 1237: 1227: 1222: 1211: 1208: 1202: 1194: 1181: 1180: 1179: 1165: 1139: 1134: 1124: 1119: 1104: 1100: 1096: 1091: 1085: 1080: 1070: 1065: 1054: 1051: 1048: 1043: 1035: 1032: 1026: 1018: 1005: 1004: 1003: 983: 975: 966: 961: 958: 953: 946: 943: 934: 921: 920: 919: 905: 902: 899: 896: 892: 889: 885: 882: 874: 870: 866: 861: 859: 843: 816: 813: 807: 797: 792: 781: 778: 772: 767: 757: 752: 741: 738: 735: 730: 722: 719: 713: 705: 692: 691: 690: 688: 687:heat equation 672: 666: 663: 660: 657: 653: 650: 643: 640: 637: 618: 615: 612: 609: 606: 603: 599: 596: 587: 582: 569: 563: 560: 557: 551: 548: 545: 537: 518: 515: 506: 501: 497: 489: 485: 482:= 0. Thus at 478: 474: 470: 466: 459: 455: 451: 447: 442: 432: 430: 423: 413: 411: 407: 402: 397: 393: 390: 386: 382: 372: 370: 366: 362: 361:North America 358: 354: 349: 347: 343: 339: 335: 325: 316: 314: 310: 305: 300: 298: 295: 291: 287: 283: 278: 274: 269: 267: 263: 259: 255: 250: 246: 242: 238: 230: 225: 216: 213: 209: 199: 197: 196:mantle plumes 187: 183: 180: 175: 170: 168: 164: 159: 155: 151: 149: 145: 141: 137: 133: 129: 125: 121: 117: 113: 103: 101: 97: 93: 89: 85: 81: 76: 72: 68: 58: 56: 52: 51:oceanic crust 48: 44: 40: 32: 19: 5605:Water column 5553:Oceanography 5528:Observations 5523:Explorations 5493:Marginal sea 5486: 5444:OSTM/Jason-2 5276:Volcanic arc 5251:Slab suction 5240: 4968:Head of tide 4858:Loop Current 4798:Ekman spiral 4584:Stokes drift 4494:Gravity wave 4469:Cnoidal wave 4353: 4349: 4303: 4299: 4251: 4247: 4241: 4206: 4202: 4192: 4167: 4163: 4157: 4124: 4120: 4114: 4089: 4085: 4079: 4059: 4052: 4025: 4021: 4011: 3978: 3974: 3968: 3925: 3921: 3908: 3862:2158/1110145 3845: 3839: 3806: 3802: 3796: 3761: 3757: 3747: 3722: 3718: 3712: 3679: 3675: 3669: 3634: 3630: 3576: 3572: 3566: 3517: 3513: 3507: 3474: 3470: 3464: 3439: 3435: 3429: 3402: 3396: 3371: 3367: 3332: 3326: 3291: 3287: 3229: 3225: 3215: 3174: 3170: 3164: 3155: 3142: 3127:RISE project 3117: 2954: 2951: 2869: 2738: 2449: 2444: 2436: 2432: 2428: 2424: 2420: 2416: 2412: 2410: 2293: 2042: 1922: 1792: 1787: 1779: 1720: 1718: 1710: 1669: 1480: 1476: 1472: 1470: 1335: 1260: 1157: 1001: 872: 868: 864: 862: 835: 585: 583: 536:steady state 483: 476: 472: 468: 464: 457: 453: 449: 438: 427:significant 425: 398: 394: 378: 369:Arctic Ocean 350: 346:Nazca plates 338:Ring of Fire 330: 301: 270: 234: 205: 192: 179:magnetometer 171: 157: 153: 152: 109: 106:Significance 88:Robert Dietz 64: 49:, where new 42: 38: 37: 5595:Thermocline 5312:Mesopelagic 5285:Ocean zones 5256:Slab window 5121:Hydrography 5061:Abyssal fan 5028:Tidal range 5018:Tidal power 5013:Tidal force 4898:Rip current 4833:Gulf Stream 4793:Ekman layer 4783:Downwelling 4758:Baroclinity 4745:Circulation 4641:Wave height 4631:Wave action 4614:megatsunami 4594:Stokes wave 4554:Rossby wave 4519:Kelvin wave 4499:Green's law 867:depends on 309:Niger Delta 304:ocean basin 286:Afar region 277:lithosphere 124:lithosphere 5665:Categories 5533:Reanalysis 5432:Satellites 5413:Sofar bomb 5261:Subduction 5236:Ridge push 5131:Ocean bank 5111:Contourite 5038:Tide gauge 5023:Tidal race 5008:Tidal bore 4998:Slack tide 4963:Earth tide 4883:Ocean gyre 4703:Wind setup 4698:Wind fetch 4661:Wave setup 4656:Wave radar 4651:Wave power 4549:Rogue wave 4479:Dispersion 3952:10220/8648 3682:(6): 369. 3637:(4): n/a. 3134:References 429:subduction 420:See also: 410:Scotia Arc 297:geologists 262:continents 136:ridge push 5395:Acoustics 5347:Sea level 5246:Slab pull 5183:tectonics 5091:Cold seep 5053:Landforms 4930:Whirlpool 4925:Upwelling 4708:Wind wave 4636:Wave base 4564:Sea state 4484:Edge wave 4474:Cross sea 4328:2156-2202 4276:2156-2202 4233:0956-540X 4028:(1): 52. 4003:0084-6597 3960:2156-2202 3898:ignored ( 3888:cite book 3880:0072-1077 3831:129438029 3788:1525-2027 3704:0091-7613 3601:1476-4687 3542:0036-8075 3421:842323181 3318:0956-540X 3262:205251567 3199:0028-0836 3027:− 3006:− 2976:− 2968:⋅ 2918:− 2908:⁡ 2899:− 2850:− 2838:∘ 2823:− 2815:⋅ 2809:∼ 2806:α 2777:∘ 2764:∼ 2708:− 2655:− 2372:− 2338:− 2317:∼ 2260:∘ 2247:∼ 2211:∘ 2198:∼ 2172:− 2160:∘ 2145:− 2137:⋅ 2131:∼ 2124:α 2112:− 2102:⋅ 2079:− 2071:⋅ 2065:∼ 2058:κ 2023:− 2010:⋅ 1987:ρ 1961:− 1948:⋅ 1934:∼ 1931:ρ 1899:ρ 1895:− 1892:ρ 1888:ρ 1883:⋅ 1880:α 1860:α 1836:α 1802:α 1731:κ 1679:α 1650:κ 1621:α 1614:π 1605:− 1570:− 1550:∞ 1541:∫ 1523:α 1443:κ 1425:⁡ 1419:⋅ 1347:≤ 1312:− 1306:Θ 1303:⋅ 1234:∂ 1219:∂ 1212:κ 1200:∂ 1192:∂ 1131:∂ 1116:∂ 1097:κ 1077:∂ 1062:∂ 1055:κ 1040:∇ 1036:κ 1024:∂ 1016:∂ 981:∂ 973:∂ 967:⋅ 940:∂ 932:∂ 844:κ 804:∂ 789:∂ 782:κ 764:∂ 749:∂ 742:κ 727:∇ 723:κ 711:∂ 703:∂ 610:− 516:− 510:Θ 507:⋅ 363:from the 294:petroleum 282:Ethiopian 273:aulacogen 128:slab pull 96:San Diego 5628:Category 5580:Seawater 5307:Littoral 5302:Deep sea 5161:Seamount 5043:Tideline 4988:Rip tide 4918:shutdown 4888:Overflow 4621:Undertow 4464:Clapotis 3661:15960331 3558:44362406 3550:17821553 3254:27842380 3098:See also 2435:, where 1778:, where 1387:′ 947:′ 893:′ 817:′ 685:and the 654:′ 600:′ 392:States. 254:isostasy 5638:Commons 5508:Mooring 5458:Related 5449:Jason-3 5439:Jason-1 5322:Pelagic 5317:Oceanic 5292:Benthic 4609:Tsunami 4579:Soliton 4358:Bibcode 4308:Bibcode 4256:Bibcode 4211:Bibcode 4172:Bibcode 4149:4315858 4129:Bibcode 4094:Bibcode 4030:Bibcode 3983:Bibcode 3930:Bibcode 3811:Bibcode 3766:Bibcode 3727:Bibcode 3684:Bibcode 3676:Geology 3639:Bibcode 3609:4171566 3581:Bibcode 3522:Bibcode 3514:Science 3499:4296143 3479:Bibcode 3444:Bibcode 3376:Bibcode 3296:Bibcode 3234:Bibcode 3207:4288496 3179:Bibcode 2294:gives: 856:is the 367:to the 342:Pacific 290:eustasy 245:Red Sea 165:on the 163:Miocene 120:diverge 90:of the 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Index

Spreading center

mid-ocean ridges
oceanic crust
volcanic activity
Alfred Wegener
Alexander du Toit
continental drift
Harold Hammond Hess
Princeton University
Robert Dietz
U.S. Naval Electronics Laboratory
San Diego
plate tectonics
continental drift
plate tectonics
diverge
lithosphere
slab pull
subduction zones
ridge push
basaltic magma
seabed
Hydrothermal vents
Miocene
East Pacific Rise
geomagnetic reversals
magnetometer

mantle plumes

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