Search results
Results From The WOW.Com Content Network
Eptesicus – or unidentified comparable form; Equus. Restoration of the Pliocene-Holocene horse Equus scotti, or Scott's horse †Equus scotti – or unidentified comparable form †Equus simplicidens; Erethizon †Eucyon †Eucyon davisi; Eumeces; Eumops †Eumops perotis – or unidentified comparable form †Geococcyx †Geococcyx ...
†Aphrodina munda – or unidentified comparable form; Petrified trunk segments of the Permian-Late Triassic conifer tree Araucarioxylon arizonicum. This species is the state fossil of Arizona †Araucarioxylon †Araucarioxylon arizonicum †Arca; Arcopagia – or unidentified comparable form †Arcopagia A – informal; Arctica †Arganodus ...
A fossil fern in the Hermit Shale from Grand Canyon National Park. You may spot some fossils like this around Cedar Ridge in the canyon.
Arizona is also the best known source of Chindesaurus fossils. Chindesaurus is notable for providing an evolutionary link between the local fauna and the most primitive known dinosaurs such as Eoraptor and Herrerasaurus, which are found in South America. [6] Prosauropods are present but rare in Arizona's Late Triassic deposits. [7]
The Martin Formation in southern Arizona contains limestone, sandstone, shale and chert deposited in the Late Devonian and laden with fish and invertebrate fossils. A lull between orogenies in the Mississippian period of the Carboniferous resulted in a major marine transgression and the formation of thick limestone.
In the Tombstone, Arizona, area, it overlies the Naco Formation. [5] In the Bisbee area, the group is divided into four formations, which in ascending stratigraphic order are the Glance Conglomerate , the Morita Formation , the Mural Limestone , and the Cintura Formation . [ 3 ]
The following description is from USGS Bulletin 798 by C. R. Longwell in 1928: [3]. In all the large intermontane valleys adjacent to the Muddy Mountains and neighboring ranges there are thick clays or silts and associated deposits that have been relatively little disturbed by crustal deformation.
Arizona [17] Blue Mesa [17] Numerous osteoderms and other skeletal material A large desmatosuchin aetosaur which was fairly common in the lower part of the Chinle Formation. Prior to 2008, fossils of D. spurensis were listed as the species D. haplocerus, until it was determined that D. haplocerus was a species name originally based on ...