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fossil locality from which fossil jaws and articulated skeletons have been collected. This fossil locality has yielded a far richer and well-preserved collection of vertebrate fossils than fossil localities associated
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separates the top of the upper mudstone from the overlying basal sandstone of the overlying cycle. For example, the lowermost sandstone-mudstone cycle consists of a basal 1.3-metre (4.3 ft)-thick
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At
Thrinaxodon Col, the oldest vertebrate fossils occur in a sandstone bed about 7-metre (23 ft) above the top of the basal log-bearing sandstone. The
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Sidor, C.A., McIntosh, J.A., Gee, B.M., Hammer, W.R., Makovicky, P.J., Smith, N.D., Smith, R.M.H., Tabor, N.J., Whitney, M.R. and
Woolley, C.H., 2023.
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lies within this 7-metre (23 ft)-thick interval above the log-bearing sandstone and below the first appearance of vertebrate fossils. The
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The
Fremouw Formation of Antarctica: Updated vertebrate fossil record and reevaluation of high-latitude Permian–Triassic paleoenvironments.
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sandstone that grades upward into a 12-metre (39 ft)-m-thick medium-grained sandstone. The medium-grained sandstone contains
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fining-upward cycles. An individual cycle consists of a basal fluvial sandstone that grades upward into an upper
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Paleoenvironment of the
Triassic therapsid Lystrosaurus in the central Transantarctic Mountains, Antarctica.
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2nd ed. Jefferson, North
Carolina and London, McFarland & Company, Inc. 1771 pp.
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remains occur in
Triassic sandstone that fills the upper portion of a paleochannel."
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264:. Overlying and associated with the underlying sandstones is a 6 m of green-gray
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The sandstones and mudstones exposed at
Thrinaxodon Col are coupled together as
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cross-cut the
Fremouw Formation throughout the Thrinaxodon Col area and region.
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Permian-Triassic boundary in the central
Transantarctic Mountains, Antarctica.
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151:. The col is along the ridge that trends southward from Rougier Hill in the
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213:. At this location, the base of the Fremouw Formation overlies a younger
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locality at which at least a dozen specimens of the mammal-like reptile
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Kitching, J.W., Collinson, J.W., Elliot, D.H. and
Colbert, E.H., 1972.
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Collinson, J.W., Hammer, W.R., Askin, R.A. and Elliot, D.H., 2006.
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were collected from Thrinaxodon Col along with part of a large
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In: Turner, M.D., and Splettstoesser, J.F., eds, pp. 11-35,
424:, 36. Washington, DC, American Geophysical Union, 453 pp.
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and mudstone with abundant fossil rootlets near the top.
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163:(US-ACAN) in 1971 by geologist David H. Elliot of the
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Triassic stratigraphy of the Shackleton Glacier area.
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Triassic vertebrates in the Transantarctic Mountains.
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Lystrosaurus zone (Triassic) fauna from Antarctica.
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201:exposed at Thrinaxodon Col consist of alternating
444:In Turner, M.C., and Splettstoesser, J.F., eds.,
446:Geology of the central Transantarctic Mountains.
419:Geology of the central Transantarctic Mountains.
499:The Triassic reptile Prolacerta in Antarctica.
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147:2 nautical miles (3.7 km) southeast of
449:American Geophysical Union Antarctic Series
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440:Collinson, J.W., and Elliot, D.H., 1984.
529:Retallack, G.J. and Hammer, W.R., 1996.
372:United States Department of the Interior
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615:Mountain passes of the Ross Dependency
534:Antarctic Journal of the United States
470:Geological Society of America Bulletin
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422:American Geophysical Research Series
610:Paleontological sites of Antarctica
363:Geographic Names Information System
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368:United States Geological Survey
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563:. You can help Knowledge by
392:Antarctica: An Encyclopedia,
288:. Twelve of 14 specimens of
625:Dufek Coast geography stubs
159:. The name was proposed to
16:Mountain pass in Antarctica
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168:Institute of Polar Studies
502:American Museum Novitates
312:Permian-Triassic boundary
178:This col is an important
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559:location article is a
497:Colbert, E.H. 1987.,
486:Earth-Science Reviews
413:Colbert, E.H., 1986.
316:Thrinaxodon liorhinus
290:Thrinaxodon liorhinus
276:Thrinaxodon Col is a
165:Ohio State University
220:. Diabase sills and
157:Queen Maud Mountains
63:Queen Maud Mountains
390:Stewart, J., 2011.
303:, and unidentified
296:tusk, specimens of
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131:85.200°S 174.317°W
92:85.200°S 174.317°W
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451:, 36, pp.103–117.
400:978-0-7864-3590-6
358:"Thrinaxodon Col"
211:Fremouw Formation
136:-85.200; -174.317
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149:Rougier Hill
143:) is a rock
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620:Dufek Coast
557:Dufek Coast
196:sedimentary
188:Thrinaxodon
134: /
95: /
70:Coordinates
604:Categories
377:2023-10-26
344:References
305:cynodontia
299:Prolacerta
294:dicynodont
281:vertebrate
207:sandstones
180:vertebrate
266:siltstone
245:claystone
203:mudstones
322:See also
278:Triassic
233:overbank
122:174°19′W
83:174°19′W
518:Science
272:Fossils
255:pebbles
229:fluvial
215:diabase
174:Geology
119:85°12′S
80:85°12′S
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398:
301:broomi
259:fossil
257:, and
252:quartz
248:clasts
199:strata
183:fossil
555:This
222:dikes
54:Range
561:stub
426:ISBN
396:ISBN
262:logs
218:sill
205:and
170:.
145:col
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592:e
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112:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
