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National Geologic Map Database

NGMDB
Statewide and regional correlation charts, lexicons, and other stratigraphic resources (1890-present)

Correlation charts and stratigraphic sections provide essential two- and three-dimensional context for the geologic names described in Geolex and in statewide and regional lexicons. Our objective is to provide access to a set of charts, sections, and lexicons that reflect the current state of the science, supplemented by older, historically significant publications that have lasting value, both for the science, and also for evaluating changes to stratigraphic terminology.

This page is a work in progress. We welcome your suggestions, especially regarding publications that should be included here. | | About this site

State Description Stratigraphic Range Date CitationShow listings for all states and territories

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URL: http://ngmdb.usgs.gov/Geolex/stratres/charts
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Page Last Modified: Fri Aug 29 16:08:11 2014