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93:. During this time, ancestral horses, primates, and rodents, among many other mammal groups, were common at Raven Ridge. At the southern edge of Raven Ridge are found the only available surface coal beds in the area.
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which provide an opportunity to understand this part of Earth's history. This section through a sequence of rock layers that were deposited between ~53-49 million years ago, has become exposed because of its later
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Eaton, Jeffrey; et al. (1989). "Evidence of
Reworked Cretaceous Fossils and their Bearing on the Existence of Tertiary Dinosaurs".
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The rocks of Raven Ridge were originally deposited on or near a shore line as horizontal sedimentary layers within the
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273:"Plants of Raven Ridge, near Rangely, CO, Rio Blanco Co. [Rio Blanco Co(s), Colorado]"
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65:. The ridge contains a diverse selection of rare plants unique to the state of Colorado.
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Late
Cretaceous and Cenozoic Mammals of North America: Biostratigraphy and Geochronology
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span the geological time interval that includes the early and middle portions of the
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Found at the summit of the ridge are a multitude of perfectly preserved fossil
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The Raven Ridge and the adjacent parallel Squaw Ridge are northwest
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156:(hoary phacelia). Numerous other plants are found there as well.
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Picard, M. Dane (1967). "AAPG/Datapages, Inc. DOI Citation".
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subsequently tilted them into a nearly vertical position.
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The
Society of Economic Paleontologists and Mineralogists
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Sedimentary rock exposure in
Colorado and Utah, U.S.
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407:Bureau of Land Management areas in Colorado
235:10.1306/5D25B7E9-16C1-11D7-8645000102C1865D
335:. Columbia University Press. p. 126.
203:Bulletin - United States Geological Survey
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23:. For the place in Washington state, see
397:Landforms of Rio Blanco County, Colorado
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120:Raven Ridge is the habitat for eight
252:"Raven Ridge - Colorado State Parks"
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200:Geological Survey (U.S.) (1910).
402:Landforms of Uintah County, Utah
278:. Colorado Native Plant Society
329:Woodburne, Michael O. (2004).
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132:(White River beardtongue),
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190:at NASA Earth Observatory
152:(ephedra buckwheat), and
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63:Bureau of Land Management
229:. search.datapages.com.
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128:(Graham's beardtongue),
25:Raven Ridge (Washington)
368:40.18944°N 109.06472°W
206:. The Survey. p.
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188:Raven Ridge, Colorado
150:Eriogonum ephedroides
148:(Colorado feverfew),
144:(Rollins's catseye),
41:is a starkly visible
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373:40.18944; -109.06472
142:Cryptantha rollinsii
140:(Mancos columbine),
136:(Dragon milkvetch),
130:Penstemon albifluvis
124:rare plant species:
45:exposure located in
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254:. parks.state.co.us
146:Parthenium ligulata
412:Ridges of Colorado
308:. JSTOR: 281–286.
138:Aquilegia barnebyi
134:Astragalus lutosus
126:Penstemon grahamii
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392:Paleogene geology
342:978-0-231-13040-0
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91:Eocene Epoch
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359:109°03′53″W
98:Uinta Basin
39:Raven Ridge
386:Categories
356:40°11′22″N
282:2009-10-11
258:2009-10-11
166:gastropods
87:outcrops
83:tectonic
75:striking
51:Colorado
322:3514776
160:Fossils
122:endemic
106:folding
69:Geology
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116:Plants
102:Uplift
318:JSTOR
276:(PDF)
172:Notes
337:ISBN
104:and
59:Utah
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310:doi
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