The Des Plaines crater or Des Plaines disturbance is recognized as an
impact crater in
Cook County,
Illinois, United States. It is located beneath the eastern part of the city of
Des Plaines, which is a suburb of
Chicago.
The Des Plaines crater is in diameter and covers an area of approximately .
[ The age of the crater is unknown but is thought to be between 280 million years and 2 million years ( Permian or younger).][ Subsurface ]strata
In geology and related fields, a stratum ( : strata) is a layer of rock or sediment characterized by certain lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by visible surfaces known as ei ...
of Cambrian
The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
through Pennsylvanian Pennsylvanian may refer to:
* A person or thing from Pennsylvania
* Pennsylvanian (geology)
The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, in the International Commission on Stratigraphy, ICS geologic timesca ...
age has been faulted and tilted by the event.cryptoexplosion In geology, a cryptoexplosion structure (or cryptovolcanic structure) is an explosion of unknown cause. The term is now largely obsolete. It was once commonly used to describe sites where there was geological evidence of a large-scale explosion wit ...
structure'' or ''cryptovolcanic structure'', as were several others in the Midwestern United States.[ The upfaulted central portion][ and the presence of shatter cone structures support the impact origin.][
]
References
External links
Aerial Exploration of the Des Plaines Impact Structure
Des Plaines, Illinois
Geology of Illinois
Impact craters of the United States
Landforms of Cook County, Illinois
Permian impact craters
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