Search results
Results From The WOW.Com Content Network
†Eumops perotis – or unidentified comparable form †Geococcyx †Geococcyx californianus; Geomys †Glossotherium; Mounted fossilized skeleton of the Pleistocene armadillo relative Glyptotherium †Glyptotherium †Glyptotherium texanum †Hemiauchenia †Hesperotestudo; Heterodon †Heterodon nasicus – or unidentified comparable form ...
This list of the Paleozoic life of Arizona contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arizona and are between 538.8 and 252.17 million years of age.
Arizona was covered by a shallow sea during the Precambrian. Stromatolites formed there. [1] During the Proterozoic interval of Precambrian time, jellyfish lived in Arizona. Their fossils were preserved in what is now the Grand Canyon. [2] Arizona was still covered by a shallow sea during the ensuing Cambrian period of the Paleozoic era.
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.
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 Gila Group has yielded a diversity of fossils at Pearson Mesa (These include four species of turtle, a heron, and fifteen mammal species. The latter includes the armadillo-like Glyptotherium arizonae, which is found in the southwestern United States only in beds of early Irvingtonian age.
In 1952, Ed Lehner discovered extinct mammoth bone fragments on his ranch, at the locality now known as the Lehner Mammoth-Kill Site. He notified the Arizona State Museum, and a summer of heavy rains in 1955 exposed more bones. Excavations, led by William W. Wasley and Emil Haury, took place in 1955–56, and again in 1974–75.
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.