Imperial Formation

{{Use dmy dates|date=February 2025}} {{Infobox rockunit | name = Imperial Formation | image = | caption = | type = Two separate geologic formations | age = 1.) Canada: Devonian of Paleozoic Era. 2.) California: Pliocene of Cenozoic Era. | prilithology = | otherlithology = | namedfor = | namedby = | region = 1.) Northwest Territories, Canada 2.) Colorado Desert, Imperial County, California, United States | country = | coordinates = | unitof = | subunits = | underlies =Palm Spring Formation (California) | overlies = Ocotillo Formation (California) | thickness = | extent = | area = | map = | map_caption = }}

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.<ref>{{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.</ref>

===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.<ref>[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"] {{Webarchive|url=https://web.archive.org/web/20151004143456/https://sdsu-dspace.calstate.edu/handle/10211.10/3 |date=4 October 2015 }}; Bell, Patricia J.; 1980.</ref>

==See also== {{Portal|Paleontology}} * List of fossiliferous stratigraphic units in California * List of fossiliferous stratigraphic units in Northwest Territories * {{C|Pliocene California}}

==References== {{Reflist}}

Category:Devonian Northwest Territories Category:Pliocene California Category:Zanclean Category:Colorado Desert Category:Geology of Imperial County, California Category:Pliocene Series of North America Category:Geologic formations of California Category:Geologic formations of the Northwest Territories Category:Paleozoic southern paleotemperate deposits Category:Devonian northern paleotropical deposits Category:Devonian southern paleotropical deposits Category:Carboniferous southern paleotemperate deposits