42:. He developed the concept of chronofauna, which he defined as "a geographically restricted, natural assemblage of interacting animal populations that has maintained its basic structure over a geologically significant period of time". He also proposed stratigraphic correlations between North American (especially the
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Modesto, Sean P.; Smith, Roger M. H.; Campione, Nicolás E.; Reisz, Robert R. (December 2011). "The last "pelycosaur": a varanopid synapsid from the
Pristerognathus Assemblage Zone, Middle Permian of South Africa".
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University of
Chicago:Department of the Geophysical Sciences:About Us:Everett C. Olson was trained as a vertebrate paleontologist and carried out pioneering research on the evolution of terrestrial ecosystems
62:. Alternatively, some scientists think that the change was gradual but that it looks abrupt because of a gap in the fossil record, called "Olson's Gap". Some of his other notable research also included the
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noted for his seminal research of origin and evolution of vertebrate animals. Through his research studying terrestrial vertebrate fossils he identified intervals of extinction in the
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50:) and Russian vertebrate-bearing strata for which additional support was found much later. The drop in terrestrial vertebrate diversity he proposed in at the end of the
451:"The age of North America's youngest Paleozoic continental vertebrates: a review of data from the Middle Permian Pease River (Texas) and El Reno (Oklahoma) Groups"
350:<1229:TRMFVE>2.0.CO;2 "The reptile Macroleter: First vertebrate evidence for correlation of Upper Permian continental strata of North America and Russia"
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said that Olson "was an internationally recognized pioneer in studies of the origin and evolution of vertebrate animals". The
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543:"Distributions of extinction times from fossil ages and tree topologies: the example of mid-Permian synapsid extinctions"
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400:"Olson's Gap or Olson's Extinction? A Bayesian tip-dating approach to resolving stratigraphic uncertainty"
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University of
California; In Memoriam;Everett Claire Olson, Biology: Los Angeles; Professor Emeritus
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said that he "carried out pioneering research on the evolution of terrestrial ecosystems". The
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said that he ranked "among the great vertebrate paleontologists of the twentieth century".
492:"Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian"
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Brocklehurst, Neil; Day, Michael O.; Rubidge, Bruce S.; Fröbisch, Jörg (12 April 2017).
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Olson, Everett C. (1982). "Extinctions of
Permian and Triassic nonmarine vertebrates".
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of the
Society of Vertebrate Paleontology, a CSEOL Distinguished Scientist (1991).
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264:. Geological Society of America Special Papers. Vol. 190. pp. 501–512.
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National
Academy Press:Biographical Memoirs:Everett C. Olson;By Michael A. Bell
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Geological
Implications of Impacts of Large Asteroids and Comets on the Earth
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130:. Olson received his undergraduate and graduate degrees, including Ph.D. in
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216:"Late Permian Terrestrial Vertebrates, U. S. A. and U. S. S. R."
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Olson was a former chair of the department of
Biology at the
22:(November 6, 1910 – November 27, 1993) was an American
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10.1130/0016-7606(2001)113<1229:TRMFVE>2.0.CO;2
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that occurred 270 million years ago now carries his name -
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Members of the United States
National Academy of Sciences
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Proceedings of the Royal
Society B: Biological Sciences
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Proceedings of the Royal Society B: Biological Sciences
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The evolution of a Permian vertebrate;Everett C Olson
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Reisz, Robert R.; Laurin, Michel (1 September 2001).
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Presidents of the Society of Vertebrate Paleontology
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303:"The Evolution of a Permian Vertebrate Chronofauna"
541:Didier, Gilles; Laurin, Michel (9 December 2021).
219:Transactions of the American Philosophical Society
16:American paleontologist, zoologist, and geologist
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738:People from Waupaca, Wisconsin
455:BSGF - Earth Sciences Bulletin
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718:University of Chicago faculty
678:Worldcat for Everett C. Olson
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112:National Academy of Sciences
92:National Academy of Sciences
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301:Olson, Everett C. (1952).
214:Olson, Everett C. (1962).
652:Diplocaulus Parvus N. SP.
623:10.1007/s00114-011-0856-2
703:American paleontologists
104:University of California
96:Paleontological Society
509:10.1098/rspb.2017.0231
417:10.1098/rspb.2020.0154
136:University of Chicago
108:University of Chicago
48:San Angelo Formations
468:10.1051/bsgf/2022007
20:Everett Claire Olson
615:2011NW.....98.1027M
603:Naturwissenschaften
560:10.7717/peerj.12577
366:2001GSAB..113.1229R
270:10.1130/SPE190-p501
100:Romer-Simpson Medal
502:(1852): 20170231.
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382:0016-7606
327:0014-3820
307:Evolution
288:0072-1077
239:0065-9746
52:Kungurian
44:Chickasha
32:geologist
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639:27865550
631:22009069
587:34966586
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436:32517621
40:Triassic
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519:5394676
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335:2405622
247:1005904
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