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This list of the prehistoric life of Arizona contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arizona.
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.
This list of the Cenozoic 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 66 million and 10,000 years of age.
Arizona's "wild west" reputation was well deserved. Tombstone was a notorious mining town that flourished longer than most, from 1877 to 1929. [ 34 ] Silver was discovered in 1877, and by 1881 the town had a population of over 10,000.
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.
This article contains a list of fossil-bearing stratigraphic units in the state of Arizona, U.S. Sites. Group or Formation Period Notes Amole Arkose: Cretaceous:
After planting, it appears the hunter-gatherers moved on to other territory to gather wild foods, and returned later in the season to harvest the ripened grain. Archaeologist Wirt H. Wills asserts that corn was originally introduced into the Southwest when the region's climate was somewhat wetter and cooler. [ 3 ]
The following are approximate tallies of current listings in Arizona on the National Register of Historic Places. These counts are based on entries in the National Register Information Database as of April 24, 2008 [ 2 ] and new weekly listings posted since then on the National Register of Historic Places web site. [ 3 ]