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::[[Search:Ordovician System|Ordovician System]] | ::[[Search:Ordovician System|Ordovician System]] | ||
::[[Search:Cambrian System|Cambrian System]] | ::[[Search:Cambrian System|Cambrian System]] | ||
[[Precambrian_Erathem| | [[Precambrian_Erathem|Search:Precambrian_Erathem]] | ||
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rect 170 379 373 405 [[Search:Ordovician System]] | rect 170 379 373 405 [[Search:Ordovician System]] | ||
rect 170 405 372 433 [[Search:Cambrian System]] | rect 170 405 372 433 [[Search:Cambrian System]] | ||
rect 8 433 373 529 [[Precambrian_Erathem]] | rect 8 433 373 529 [[Search:Precambrian_Erathem]] | ||
rect 8 36 61 433 [[Search:Phanerozoic]] | rect 8 36 61 433 [[Search:Phanerozoic]] | ||
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Revision as of 14:03, 22 October 2019
Use the links to the right to navigate to the stratigraphic unit you are looking for, or search in several ways.
In most cases, the geologic information on each page is based on historical unit descriptions from either ISGS Bulletin 94, 95, or 104 (see About ILSTRAT). However, this online resource was not designed to be a static receptacle of previously published material. If you are a member of the geologic community, please consider contacting us to contribute to the efforts to update the contents of ILSTRAT-- either by adding new material like pictures or logs, updating geologic understanding with recent referenced works, or acting as editor/reviewer. In this way ILSTRAT can become an accurate reflection of current stratigraphic understanding in Illinois, driven by those most familiar with its intricacies.
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