Imperial Formation

{{Infobox rockunit

| name = Imperial Formation

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| type = Two separate geologic formations

| age =
1.) Canada: Devonian of Paleozoic Era.
2.) California: Pliocene of Cenozoic Era.

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| region = 1.) Northwest Territories,
Canada
2.) Colorado Desert,
Imperial County, California,
United States

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| underlies =Palm Spring Formation (California)

| overlies = Ocotillo Formation (California)

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The Imperial Formation is the name of two distinct and unrelated geologic formations in North America, of different geologic Eras.

Separate formations

=Canadian Paleozoic Era formation=

The older Imperial Formation occurs in the Northwest Territories of Canada. It preserves fossils dating back to the Devonian period of the Paleozoic Era.{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org|access-date= 17 December 2021|archive-date= 25 March 2022|archive-url= https://web.archive.org/web/20220325060448/http://www.fossilworks.org/cgi-bin/bridge.pl?action=home|url-status= live}}; Paleozoic Era Canada.

=Californian Cenozoic Era formation=

The younger Imperial Formation occurs in the Colorado Desert, in Imperial County of Southern California. It dates to the Zanclean−Lower Pliocene stage of the Pliocene Epoch, during the Neogene Period of the Cenozoic Era.

It underlies the Palm Spring Formation, and overlies the Ocotillo Formation.[https://sdsu-dspace.calstate.edu/handle/10211.10/3 San Diego State University.edu: "Environments of deposition, Pliocene Imperial Formation, Southeast Coyote Mountains, Imperial County, California"]; Bell, Patricia J.; 1980.