Geologic Maps

Geologic maps show the underlying distribution of geologic features such as fault lines and types of rocks. The geologic features are usually represented by colors, lines, and special symbols printed on top of a regular map called a base map.

Geologic Atlas of Texas

Set of individual map sheets showing the geological structure of almost the entire state. Most of the maps come with an accompanying booklet explaining how to interpret the map. If you would like to see the map sheet from the Geologic Atlas of Texas for a specific area, ask at the Government Documents Service Desk. We have an index map to help you determine which sheet you need. Maps can be purchased online from the Bureau of Economic Geology.

Digital Tectonic Activity Map

The Digital Tectonic Activity Map (DTAM) is a new visualization tool for both researcher and educator alike to better understand tectonic activity of our planet for the past 1 million years. DTAM is a Geographical Information System (GIS) that displays a realistic synoptic view of present global tectonism by filling in the cartographic gap between conventional geological maps and plate reconstruction maps.

Geologic Maps of US States

Digital geologic maps of the US states with consistent lithology, age, GIS database structure, and format

Geology of the Conterminous United States

A digital version of the Geologic Map of the United States, originally published at a scale of 1:2,500,000 (King and Beikman, 1974b). It excludes Alaska and Hawaii.

USGS Open-File Reports

Online versions of selected maps and mapping products in the USGS Open-File series (nonpermanent, unpublished manuscript reports, maps, and other material that are made available for public consultation at depositories) from 1970 to the present.

Texas Geologic Map Data

A GIS database of geologic units and structural features in Texas, with lithology, age, data structure, and format written and arranged just like the other states.

General Geologic Map of the World

World geology compiled by the Geological Survey of Canada at approximately 1:35,000,000 scale, published there as Open File Report 2915.

Geologic Maps

Simple explanation from the U.S. Geological Survey of what geologic maps are and how to use them.

GIS Data from the World Petroleum Assessment

Includes geologic units and structural features at a broad scale for continents outside North America.

OneGeology

An international effort to improve the availability and integration of world geologic map data