This map is a compilation of the bedrock geology of the st louis 30 x 60 quadrangle 1100000 scale it presents a generalized overview of the distribution of formations stratigraphy and struc ture found in the area with the exception of structural and tectonic interpretations made by the author it is entirely derived from pre . Usgs us geological survey national geologic map database check out the bedrock geologic map of the st louis 30 x 60 quadrangle missouri and illinois map published by the us geological survey. The gov means its official federal government websites often end in gov or mil before sharing sensitive information make sure youre on a federal government site the site is secure the https ensures that you are connecting to the official website and that any information you provide is . This record is maintained in the national geologic map database ngmdb the ngmdb is a congressionally mandated national archive of geoscience maps reports and stratigraphic information developed according to standards defined by the cooperators ie the usgs and the association of american state geologists aasg. Corporate name geological survey us title bedrock geologic map of the st louis 30 x 60 quadrangle missouri and illinois us department of the interior us geological survey compiled by richard w harrison
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