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professor James
Harrison Quinn. In the course of his research, Quinn made hypothetical clay models of the missing bones in the animal's foot and duplicated the actual fossils with plaster cast in latex molds. Quinn published an abstract about the bones and nicknamed the animal "Arkansaurus fridayi".
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From 2001 to 2003, then
University of Arkansas undergraduate, ReBecca Hunt, studied the fossils and presented on them at several meetings, including the 2002 Society of Vertebrate Paleontology Annual Meeting, the 2002 Geological Society of America Annual Meeting, and the 2003 Arkansas Undergraduate
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The Briar quarry has two separate surfaces that each preserve thousands of dinosaur tracks. The operations of the quarry continue to both uncover and destroy dinosaur footprints. In 1989 Pittman successfully dated the dinosaur tracks of the Briar quarry as equal in age to the lower
275:, Arkansas was home to a variety of marine invertebrates. Later in the period, the northern region of the state was exposed as dry land by the gradual withdrawal of the sea. Rivers flowed across this area of the state.
1069:
Hunt, ReBecca K., Daniel Chure, and Leo Carson Davis. 2003. "An early
Cretaceous theropod foot from southwestern Arkansas." Pages 87–103 in Proceedings of the 2003 Arkansas Undergraduate Research Conference.
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Hunt, ReBecca K., Daniel Chure, and Leo Carson Davis. 2003. An early
Cretaceous theropod foot from southwestern Arkansas. Pages 87-103 in Proceedings of the 2003 Arkansas Undergraduate Research Conference.
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quarry in southwestern
Arkansas preserves dinosaur tracks, which have hindered the quarry operations. This is called the Briar Site. Some areas of the quarry were rough due to what appeared to be large
300:, and other invertebrates. The sea had completely vanished by the start of the Permian. With the final retreat of the sea, local sedimentation had stopped and begun being eroded away.
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Arkansas was also home to a great diversity of life. Remains from this period, like the
Ordovician, were preserved in the Cushman area of Independence County. During the ensuing
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fossils were preserved in the
Bradford area of Jackson County. The sea gradually and inconsistently retreated toward the south, leaving the state altogether by the mid-to-late
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Research
Conference. Hunt published a brief description of the fossils with the limited scientific research available at the time.
613:, examined the Arkansaurus foot and found it to be larger but otherwise nearly identical to a new species found two years prior in
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seawater covered the southern region of the state. Southern and northeastern
Arkansas were likewise covered by the sea into the
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397:. During the Late Cretaceous the region now occupied by the Quachita Mountains of Arkansas may have attracted long necked
835:"Paleobiogeographical Implications of a New Ornithomimosaur Dinosaur from the Early Cretaceous Trinity Group of Arkansas"
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area also preserves a diverse invertebrate fauna from this time period. During the early part of the
Carboniferous, the
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and found evidence for 10 parallel sauropod trackways on a rock surface that had also been extensively "trampled".
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tracks resembled the "potholes" seen at the Briar site in Arkansas. Pittman later performed an aerial
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This abstract was the first scientific mention of any dinosaur bones ever found in Arkansas.
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rocks of Early Cretaceous age. Kirkland concurred that Arkansaurus was likely related to
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837:. Geological Society of America Abstracts with Programs. Geological Society of America.
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fossils are known from Arkansas, so the state's fossil record does not begin until the
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In the fall of 1995 senior paleontologist of the Utah Geological Survey (then with
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the state was still covered by seawater and home to marine invertebrates such as
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1111:
Hunting for Fossils: A Guide to Finding and Collecting Fossils in All 50 States
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623:. Future clues about Arkansaurus may come from a similar dinosaur discovery in
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have been preserved in the southwestern part of the state. The ornithomimosaur
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lived at this time, known only from remains of its foot discovered in 1972.
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The seas of southern and eastern Arkansas began to shrink during the early
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fossils were preserved in the Bradford area of Jackson County and in the
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Northern and central Arkansas was a terrestrial environment during the
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epoch, Arkansas was home to a marine invertebrate fauna that included
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Paleontological research occurring within or conducted by Arkansas
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891:
Leslie, Springer, Scotchmoor (2005); "Paleontology and geology".
788:"Ammonites from the Saratoga Chalk (Upper Cretaceous), Arkansas"
144:, although the waters were gradually shrinking away. During the
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Leslie, Stephen, Dale Springer, Judy Scotchmoor. July 1, 2005.
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Lockley and Hunt (1999); "Problematic Potholes", pages 191–192.
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Everhart (2005); "Where the Elasmosaurs Roamed", pages 137–138.
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Oceans of Kansas—A Natural History of the Western Interior Sea
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Everhart (2005); "Peteranodons: Rulers of the Air", page 213.
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the state's seas were inhabited by marine invertebrates and
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60:. Nearly all of the state's fossils have come from ancient
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Lockley and Hunt (1999); "Problematic Potholes", page 192.
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Lockley and Hunt (1999); "Problematic Potholes", page 191.
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327:. The invertebrates of Arkansas's Cretaceous sea included
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research occurring within or conducted by people from the
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Everhart (2005); "Turtles: Leatherback Giants", page 112.
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Southwestern Arkansas was part of the coastline to the
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86:. This sea would begin its withdrawal during the
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156:spread that were inhabited by creatures such as
582:. After he visited the Purgatoire tracksite in
470:. The echinoderm fossils were preserved in the
343:. During the Cretaceous, Arkansas was home to
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72:would come to be home to creatures including
116:. On land the state was home to long necked
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627:that, as of 2007, has yet to be described.
401:from hundreds of miles away as a source of
1530:Paleontology in the United States by state
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786:Kennedy, W. J.; Cobban, W. A. (May 1993).
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319:, the region of Arkansas southeast of the
1072:Braden, Angela K. "The Arkansas Dinosaur
1103:Dinosaur Tracks of Western North America
542:In August 1972, J. B. Friday discovered
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995:: The Arkansas Dinosaur", pages 2–3.
148:, the state's climate cooled. Local
1087:. Indiana University Press, 320 pp.
13:
1535:Science and technology in Arkansas
1105:. Columbia University Press. 1999.
1101:Lockley, Martin and Hunt, Adrian.
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255:. This fauna was preserved in the
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1192:Paleontology in the United States
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1048:: The Arkansas Dinosaur", page 5.
1008:: The Arkansas Dinosaur", page 3.
952:: The Arkansas Dinosaur", page 2.
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1113:. Collier Books. p. 348.
1098:. Accessed September 21, 2012.
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98:conditions continued into the
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833:Hunt-Foster, ReBecca (2018).
671:University of Arkansas Museum
405:. Other vertebrates included
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1520:Natural history of Arkansas
727:Paleontology in Mississippi
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52:of Arkansas spans from the
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1152:Geologic units in Arkansas
1137:at The Paleontology Portal
934:; "Arkansas", pages 95–96.
586:he noticed that the local
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1142:"Arkansas's First People"
843:10.1130/abs/2018sc-310439
804:10.1017/s002233600003688x
742:Paleontology in Tennessee
722:Paleontology in Louisiana
279:Arkansas was home to the
1525:Paleontology in Arkansas
1078:Arkansas Geologic Survey
737:Paleontology in Oklahoma
732:Paleontology in Missouri
607:Dinamation International
307:. However, by the early
31:Paleontology in Arkansas
1109:Murray, Marian (1974).
1096:The Paleontology Portal
792:Journal of Paleontology
656:Natural history museums
427:Western Interior Seaway
64:life. During the early
1083:Everhart, M. J. 2005.
922:; "Arkansas", page 97.
910:; "Arkansas", page 96.
858:Cite journal requires
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323:was submerged by the
245:Arkansas was home to
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714:United States portal
23:The location of the
1074:Arkansaurus fridayi
1046:Arkansaurus fridayi
1006:Arkansaurus fridayi
993:Arkansaurus fridayi
950:Arkansaurus fridayi
700:Paleontology portal
662:Museum of Discovery
641:Helen Frances James
600:Glen Rose Formation
576:dinosaur footprints
512:giant ground sloths
444:Arkansaurus fridayi
211:Independence County
203:East Lafferty Creek
166:giant ground sloths
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321:Ouachita Mountains
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125:ostrich dinosaurs
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111:
73:
62:invertebrate
30:
29:
1321:Mississippi
1236:Connecticut
666:Little Rock
647:on 22 May,
645:Hot Springs
546:bones in a
460:echinoderms
429:during the
403:gastroliths
399:plesiosaurs
369:Arkadelphia
285:Pentremites
253:brachiopods
228:Sporangites
191:Precambrian
136:During the
130:Arkansaurus
96:Terrestrial
80:brachiopods
1514:Categories
1436:Washington
1356:New Mexico
1351:New Jersey
1226:California
1064:References
555:Lockesburg
492:Turritella
468:Turritella
435:footprints
431:Cretaceous
364:Turritella
313:Cretaceous
267:area. The
248:Archimedes
199:Ordovician
172:Prehistory
150:grasslands
108:Cretaceous
75:Archimedes
54:Ordovician
33:refers to
1446:Wisconsin
1411:Tennessee
1316:Minnesota
1291:Louisiana
820:131239610
812:0022-3360
753:Footnotes
680:Jonesboro
553:pit near
520:mastodons
439:sauropods
390:Bothremys
333:echinoids
291:Composita
269:Habberton
257:West Fork
233:Caddo Gap
223:conodonts
209:areas of
195:Paleozoic
162:mastodons
121:dinosaurs
84:conodonts
66:Paleozoic
41:state of
1492:Arkansas
1431:Virginia
1381:Oklahoma
1361:New York
1336:Nebraska
1326:Missouri
1311:Michigan
1301:Maryland
1286:Kentucky
1266:Illinois
1241:Delaware
1231:Colorado
1221:Arkansas
1135:Arkansas
686:See also
625:Maryland
588:sauropod
584:Colorado
572:potholes
544:dinosaur
516:mammoths
496:Tertiary
486:area of
474:area of
472:Bradford
452:Cenozoic
381:Saratoga
371:area of
309:Jurassic
305:Triassic
297:Spirifer
281:blastoid
263:and the
259:area of
221:period,
219:Devonian
215:Silurian
158:mammoths
138:Cenozoic
127:such as
118:sauropod
104:Jurassic
100:Triassic
43:Arkansas
1478:Portals
1451:Wyoming
1426:Vermont
1331:Montana
1271:Indiana
1251:Georgia
1246:Florida
1216:Arizona
1206:Alabama
1147:YouTube
1080:. 2007.
526:History
508:Ice Age
418:Exogyra
352:Exogyra
337:oysters
207:Cushman
154:forests
146:Ice Age
92:Permian
56:to the
1386:Oregon
1341:Nevada
1281:Kansas
1256:Hawaii
1211:Alaska
1199:States
1117:
818:
810:
592:survey
567:gypsum
551:gravel
518:, and
504:swamps
500:rivers
490:. The
480:Ostrea
478:. The
466:, and
464:Ostrea
456:Eocene
407:sharks
395:snails
358:Ostrea
341:snails
339:, and
164:, and
142:sharks
82:, and
58:Eocene
50:record
47:fossil
45:. The
1416:Texas
1296:Maine
1261:Idaho
816:S2CID
329:clams
1421:Utah
1376:Ohio
1276:Iowa
1156:USGS
1115:ISBN
864:help
808:ISSN
649:1956
615:Utah
502:and
377:Fish
294:and
225:and
205:and
152:and
39:U.S.
1154:at
1145:on
1076:".
839:doi
800:doi
609:),
534:An
383:in
235:in
189:No
70:sea
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1094:.
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939:^
896:^
872:^
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853:}}
849:{{
814:.
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796:67
794:.
790:.
760:^
678:-
664:,
565:A
522:.
514:,
462:,
409:.
375:.
361:,
355:,
349:,
335:,
331:,
239:.
213:.
168:.
160:,
133:.
78:,
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1177:t
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866:)
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802::
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538:.
421:.
185:.
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