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Kenneth C. Macdonald

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by Overlapping Spreading Centers and other types of nontransform discontinuities. The long segments persist for millions of years, while the finer scale segments are shorter-lived, hundreds of thousands of years or less. The shorter segments are important because they define the scale at which individual volcanoes function on the ridge, which, in turn, control the creation of new oceanic crust and hydrothermal activity
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including its spreading centers and transform faults, two of the three types of plate boundaries central to the theory of plate tectonics. His work has taken him to the north and south Atlantic oceans, the north and south Pacific oceans, the Indian Ocean, the Red Sea and the Sea of Cortez, as well as
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Previous to this discovery, it was thought that mid-ocean ridges were offset only by transform faults, usually at right angles. The expedition found that the ridge is segmented on a length scale of hundreds of kilometers by transform faults, but also at much shorter scales, km to tens of kilometers,
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overlap, apparently pushing against each other, which would violate one of the rules of plate tectonics: plates are rigid. This paradox is solved by the fact that the OSCs are non-steady-state, and propagate along the ridge; as one segment lengthens, the neighboring segment shortens, and the
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Joint Program in Oceanography specializing in marine geophysics in 1975. He was awarded a Cecil H. and Ida Green Research Fellowship to work at the Institute of Geophysics and Planetary Physics with James Brune in 1975. He joined the research staff at the
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Macdonald, K.C., D.A. Castillo, S.P. Miller, P.J. Fox, K.A. Kastens and E. Bonatti (1986). "Deep-tow studies of the Vema fracture zone I. Tectonics of a major slow slipping transform fault and its intersection with the Mid-Atlantic Ridge".
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Macdonald, Ken; Sempere, Jean-Christophe; Fox, P. J. (1984). "East Pacific Rise from Siqueiros to Orozco Fracture Zones: Along-strike continuity of axial neovolcanic zone and structure and evolution of overlapping spreading centers".
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Macdonald, K.C., S.P. Miller, B.P. Luyendyk, T.M. Atwater and L. Shure (1983). "Investigation of a Vine-Matthews magnetic lineation from a submersible: The source and character of marine magnetic anomalies, 1983".
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In recognition of his work he was the first marine geophysicist to be awarded the Cody gold medal and prize for his outstanding work and leadership in the Ocean Sciences as well as election as Fellow to the
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and Macdonald, K.C., 1985. The Geology of Deep-Sea Hot Springs: Recently discovered hot springs burst from the seafloor in areas of active volcanism and deposit metal-rich minerals on the seabed.
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on the East Pacific Rise in 1979, and was the first to calculate their contribution to global geothermal heat flux. He was also chief scientist and lead diver on the expedition which documented
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Macdonald, K.C., J.-C. Sempere ,P.J. Fox and R. Tyce (1987). "Tectonic evolution of ridge axis discontinuities by the meeting, linking or self-decapitation of neighboring ridge segments".
636:"Hydrothermal vent distribution along the East Pacific Rise crest (9°09′–54′N) and its relationship to magmatic and tectonic processes on fast-spreading mid-ocean ridges" 255:. In 1979, he joined the faculty of the Department of Geological Sciences at UCSB and the Marine Sciences Institute as an associate professor and research geophysicist. 1790: 699:
Macdonald, Ken C.; Fox, P. J.; Alexander, Russ T.; Pockalny, Robert; Gente, Pascal (March 1996). "Volcanic growth faults and the origin of Pacific abyssal hills".
678:; Macdonald, Ken (1992). "East Pacific Rise 8°–10°30′N: Evolution of ridge segments and discontinuities from SeaMARC II and three-dimensional magnetic studies". 750:
Luyendyk, B.P. and K.C. Macdonald (1977). "Physiography and structure of the Famous Rift Valley inner floor observed with a deep towed instrument package".
334: 290:, the recording of magnetic reversals in the volcanic rocks of the deep seafloor, an important aspect of proving seafloor spreading and plate tectonics. 1361: 1312: 1185: 1135: 1037: 995: 777:
Macdonald, K.C. (1977). "Near-bottom magnetic anomalies, asymmetric spreading, oblique spreading, and tectonics of the Mid-Atlantic Ridge (37°N)".
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Macdonald, K.C., K. Becker, F.N. Spiess and R. Ballard (1980). "Hydrothermal heat flux of the black smoker vents on the East Pacific Rise".
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Macdonald, K C (May 1982). "Mid-Ocean Ridges: Fine Scale Tectonic, Volcanic and Hydrothermal Processes Within the Plate Boundary Zone".
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Review Committee (1979–82), founding member of the RIDGE Steering Committee (1987–90), member of the U.S. Geodynamics Committee (of the
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Macdonald, K.C. and B.P. Luyendyk (1977). "Deep-tow studies of the structure of the Mid-Atlantic Ridge crest near 37°N (Famous)".
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Langmuir, CH, JF Bender, and R Batiza (1986). "Petrological and tectonic segmentation of the East Pacific Rise, 5 30′–14 30′ N".
198: 1438:; White, Scott M. (October 2004). "Fine-scale segmentation of volcanic/hydrothermal systems along fast-spreading ridge crests". 1800: 1382:; Klein, Emily M. (2016). "Tectonic and magmatic segmentation of the Global Ocean Ridge System: a synthesis of observations". 330: 239: 96: 243: 125: 1200: 419: 248: 197:
in 1947. As of 2018 he is professor emeritus at the Department of Earth Science and the Marine Sciences Institute at the
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Ballard, Robert and Emory Kristof, Window on Earth’s Interior, National Geographic, vol. 150, no.2, p.228-249, Aug 1976.
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Macdonald, K.C. and P.J. Fox (1983). "Overlapping spreading centers: New accretion geometry on the East Pacific Rise".
401: 231: 210:. Macdonald has participated in over 40 deep sea expeditions, and was chief- or co-chief scientist on 31 expeditions. 1218: 1785: 1092:
Macdonald, K.C., K. Kastens, S.P. Miller and F.N. Spiess (1979). "Deep-tow studies of the Tamayo transform fault".
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Spiess, F.N.; K.C. Macdonald; et al. (1980). "East Pacific Rise: Hot springs and geophysical experiments".
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Macdonald, Ken C., “Mid-Ocean Ridges:  The Quest for Order”,  Oceanus, vol. 34, no. 4, p. 9-10, 1991.
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Atwater, T.M. and K.C. Macdonald (1977). "Are spreading centres perpendicular to their transform faults?".
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He has contributed to the advancement of ocean sciences by serving on the Ocean Studies Board of the
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Macdonald, Ken C.; Fox, P. J.; Perram, L. J.; Eisen, M. F.; Haymon, R. M.; Miller, S. P.;
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His PhD work focused on the tectonic and magnetic properties of the Mid-Atlantic Ridge on
8: 460: 444: 1672: 1617: 1554: 1502:, Rebirth of a Deep-sea Vent, National Geographic, vol. 186, no.5, p. 114-126, Nov 1994. 1395: 1290: 1247: 1163: 1105: 1091: 922: 844: 712: 594: 553: 520: 498: 490: 1692: 1637: 1625: 1472:
GROSVENOR, G., 1979. INCREDIBLE WORLD OF THE DEEP-SEA OASES-STRANGE WORLD WITHOUT SUN.
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Macdonald, K.C. and T.M. Atwater (1978). "Evolution of rifted ocean ridges".
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He has also served in the following editorial capacities: associate editor,
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Fox, Edward, “The Deep”,  Esquire Magazine, p.104-110, April 1994.
1113: 201:(UCSB). His work focuses on the tectonics and geophysics of the global 37: 1562: 1412: 691: 1339: 1325: 1255: 1069: 1052: 852: 720: 561: 207: 1403: 282:- a research expedition which discovered superheated "black smoker" 1581:
Reynales, Trish, “Islands of the Future”,  p.24-25, Aug. 1993.
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to the deep seafloor on over 50 dives in the research submersible
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This article is about the oceanographer. For the politician, see
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in 1980 for the discovery and analysis of black smoker vents.
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graduating with a B.S. in engineering in 1970. Funded by a
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He was chief scientist on the expedition which discovered “
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Haymon, Rachel M.; Fornari, Daniel J.; Edwards, Margo H.;
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10.1130/0091-7613(1987)15<993:TEORDB>2.0.CO;2
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10.1130/0016-7606(1977)88<621:DSOTSO>2.0.CO;2
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10.1130/0016-7606(1977)88<541:NMAASO>2.0.CO;2
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10.1130/0016-7606(1977)88<648:PASOTI>2.0.CO;2
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Newcomb Cleveland Prize of Amer. Assoc. Adv. Science
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American Association for the Advancement of Science
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ocean spreading centers deep sea hydrothermal vents
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Macdonald and map of East Pacific Rise crest at 9°N
1599: 674: 1762: 1384:Geological Society, London, Special Publications 1205:. New York: Cambridge University Press. 318 pp. 1791:University of California, Santa Barbara faculty 776: 375: 236:National Science Foundation Graduate Fellowship 1600:Macdonald, Ken C.; Luyendyk, Bruce P. (1981). 251:in 1976 as Research Geophysicist working with 479:Annual Review of Earth and Planetary Sciences 1655:Macdonald, Kenneth C.; Fox, Paul J. (1990). 1654: 1360:: CS1 maint: multiple names: authors list ( 1311:: CS1 maint: multiple names: authors list ( 1184:: CS1 maint: multiple names: authors list ( 1134:: CS1 maint: multiple names: authors list ( 1036:: CS1 maint: multiple names: authors list ( 994:: CS1 maint: multiple names: authors list ( 680:Journal of Geophysical Research: Solid Earth 509:Journal of Geophysical Research: Solid Earth 438: 353:for the most important article published in 1434: 293:Macdonald led expeditions which mapped the 213: 1050: 36: 1718: 1411: 1068: 476: 388:Panel for the Advanced Drilling Project ( 362: 1053:"Magnetic Reversals from a Submersible" 199:University of California, Santa Barbara 1763: 1721:"Exploring-the-global-mid-ocean-ridge" 1198: 311:” (OSCs). In this geometry two active 1536: 331:American Academy of Arts and Sciences 240:Massachusetts Institute of Technology 97:American Academy of Arts and Sciences 1602:"The Crest of the East Pacific Rise" 1511: 343:Geological Society of America (1995) 323: 258: 244:Woods Hole Oceanographic Institution 130:Scripps Institution of Oceanography; 126:Woods Hole Oceanographic Institution 1440:Earth and Planetary Science Letters 640:Earth and Planetary Science Letters 634:; Macdonald, Ken C. (1 June 1991). 577:Macdonald, K. C.; Scheirer, D. S.; 499:10.1146/annurev.ea.10.050182.001103 420:Earth and Planetary Science Letters 249:Scripps Institution of Oceanography 13: 1626:10.1038/scientificamerican0581-100 1539:"Researchers get back to the deep" 443:His work has been featured in the 402:National Undersea Research Program 16:American oceanographer (born 1947) 14: 1812: 1681:10.1038/scientificamerican0690-72 470: 278:He was co-chief scientist of the 271:. (his other primary advisor was 242:in 1970, graduating from the MIT/ 226:, California, and graduated from 92:Fellow Amer. Assoc. Adv. Science 1737: 1712: 1703: 1648: 1593: 1584: 1575: 1530: 1505: 1492: 1483: 1466: 1428: 1368: 1319: 1270: 1227: 1192: 1142: 1085: 414:Journal of Geophysical Research 1044: 1002: 953: 902: 867: 824: 797: 770: 743: 429:Encyclopedia of Ocean Sciences 86:Fellow Geological Soc. America 1: 1801:Harry Ells High School alumni 931:10.1126/science.207.4438.1421 736: 425:Marine Geophysical Researches 309:Overlapping Spreading Centers 146:Bruce Luyendyk, Tanya Atwater 982:10.1016/0012-821X(80)90163-6 896:10.1016/0012-821X(78)90017-1 660:10.1016/0012-821X(91)90226-8 603:10.1126/science.253.5023.986 382:National Academy of Sciences 376:Leadership in the profession 316:overlapped region migrates. 7: 392:) (1983–85), member of the 89:Fellow Amer. Geophys. Union 51:1947 (age 76–77) 10: 1817: 1719:Macdonald, Ken C. (1998). 1460:10.1016/j.epsl.2004.08.002 339:American Geophysical Union 18: 439:Public outreach and media 398:National Research Council 390:Deep Sea Drilling Project 195:San Francisco, California 154: 150: 140: 118: 111: 79: 71: 63: 55: 47: 35: 28: 1512:Nash, Nathaniel (1993). 1211:10.1017/CBO9781139084260 463:, Oceanus Magazine, and 455:, Islands Magazine, and 384:(1980–83), the Oceanic 214:Early life and education 1786:American oceanographers 1452:2004E&PSL.226..367H 1172:10.1029/JB091iB03p03334 1024:10.1029/JB088iB04p03403 974:1980E&PSL..48....1M 962:Earth Planet. Sci. Lett 888:1978E&PSL..39..319M 876:Earth Planet. Sci. Lett 652:1991E&PSL.104..513H 529:10.1029/JB089iB07p06049 433:Encyclopedia of Geology 351:Newcomb Cleveland Prize 183:Kenneth Craig Macdonald 1781:American geophysicists 372: 341:(1995), Fellow of the 228:Harry Ells High School 1657:"The Mid-Ocean Ridge" 1378:; Smith, Deborah K.; 459:. He has written for 366: 230:in 1966. He attended 218:Macdonald grew up in 1796:Marine geophysicists 1537:Feder, Toni (2014). 1376:Carbotte, Suzanne M. 1199:Searle, R C (2013). 417:; associate editor, 30:Kenneth C. Macdonald 1673:1990SciAm.262f..72M 1661:Scientific American 1618:1981SciAm.244e.100M 1606:Scientific American 1555:2014PhT....67f..29F 1474:NATIONAL GEOGRAPHIC 1396:2016GSLSP.420..249C 1291:1987Geo....15..993M 1248:1983Natur.302...55M 1164:1986JGR....91.3334M 1106:1979MarGR...4...37M 1051:Cann, J.R. (1983). 923:1980Sci...207.1421S 917:(4438): 1421–1433. 845:1977Natur.270..715A 806:Bull. Geol. Soc. Am 779:Bull. Geol. Soc. Am 752:Bull. Geol. Soc. Am 713:1996Natur.380..125M 595:1991Sci...253..986M 554:1988Natur.335..217M 521:1984JGR....89.6049M 491:1982AREPS..10..155M 461:Scientific American 445:National Geographic 267:expeditions led by 191:marine geophysicist 1748:American Scientist 1498:Lutz, Richard and 1114:10.1007/BF00286145 465:American Scientist 431:; section editor, 427:; section editor, 373: 284:hydrothermal vents 238:, he attended the 1563:10.1063/PT.3.2415 1436:Haymon, Rachel M. 1334:(6078): 422–429. 1158:(B3): 3334–3354. 1094:Mar. Geophys. Res 839:(5639): 715–719. 707:(6570): 125–129. 692:10.1029/91JB03065 686:(B5): 6959–6982. 676:Carbotte, Suzanne 628:Carbotte, Suzanne 589:(5023): 986–994. 548:(6187): 217–225. 515:(B7): 6049–6069. 324:Awards and honors 313:spreading centers 259:Career and impact 203:mid-oceanic ridge 180: 179: 113:Scientific career 1808: 1755: 1754:(5), pp.441-449. 1741: 1735: 1734: 1732: 1731: 1725:Oceanus magazine 1716: 1710: 1707: 1701: 1700: 1652: 1646: 1645: 1597: 1591: 1588: 1582: 1579: 1573: 1572: 1570: 1569: 1534: 1528: 1527: 1525: 1524: 1509: 1503: 1496: 1490: 1487: 1481: 1480:(5), pp.680-683. 1470: 1464: 1463: 1446:(3–4): 367–382. 1432: 1426: 1425: 1415: 1380:Cannat, Mathilde 1372: 1366: 1365: 1359: 1351: 1340:10.1038/322422a0 1323: 1317: 1316: 1310: 1302: 1274: 1268: 1267: 1256:10.1038/302055a0 1231: 1225: 1224: 1202:Mid-ocean ridges 1196: 1190: 1189: 1183: 1175: 1146: 1140: 1139: 1133: 1125: 1089: 1083: 1082: 1072: 1070:10.1038/305100a0 1048: 1042: 1041: 1035: 1027: 1006: 1000: 999: 993: 985: 957: 951: 950: 906: 900: 899: 871: 865: 864: 853:10.1038/270715a0 828: 822: 821: 801: 795: 794: 774: 768: 767: 747: 732: 721:10.1038/380125a0 695: 671: 646:(2–4): 513–534. 622: 573: 562:10.1038/335217a0 532: 502: 457:Esquire Magazine 367:KC Macdonald on 337:, Fellow of the 333:, Fellow of the 302:Transform faults 176: 173: 171: 169: 167: 165: 163: 161: 142:Doctoral advisor 133:UC Santa Barbara 40: 26: 25: 1816: 1815: 1811: 1810: 1809: 1807: 1806: 1805: 1761: 1760: 1759: 1758: 1742: 1738: 1729: 1727: 1717: 1713: 1708: 1704: 1653: 1649: 1598: 1594: 1589: 1585: 1580: 1576: 1567: 1565: 1535: 1531: 1522: 1520: 1510: 1506: 1497: 1493: 1488: 1484: 1471: 1467: 1433: 1429: 1404:10.1144/SP420.5 1373: 1369: 1353: 1352: 1324: 1320: 1304: 1303: 1285:(11): 993–997. 1275: 1271: 1242:(5903): 55–58. 1232: 1228: 1221: 1197: 1193: 1177: 1176: 1152:J. Geophys. Res 1147: 1143: 1127: 1126: 1090: 1086: 1049: 1045: 1029: 1028: 1012:J. Geophys. Res 1007: 1003: 987: 986: 958: 954: 907: 903: 872: 868: 829: 825: 802: 798: 775: 771: 748: 744: 739: 579:Carbotte, S. M. 538:Carbotte, S. M. 473: 441: 378: 326: 261: 216: 185:is an American 158: 136: 107: 67:UC Berkeley MIT 64:Alma mater 43: 31: 24: 21:K. C. 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Index

K. C. MacDonald

American Academy of Arts and Sciences
Woods Hole Oceanographic Institution
Doctoral advisor
www.geol.ucsb.edu/faculty/macdonald/index.php
oceanographer
marine geophysicist
San Francisco, California
University of California, Santa Barbara
mid-oceanic ridge
ALVIN
El Cerrito
Richmond
Harry Ells High School
UC Berkeley
National Science Foundation Graduate Fellowship
Massachusetts Institute of Technology
Woods Hole Oceanographic Institution
Scripps Institution of Oceanography
Fred Spiess
Project FAMOUS
Bruce Luyendyk
Tanya Atwater
RISE project
hydrothermal vents
Vema
Tamayo
Transform faults
Overlapping Spreading Centers

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