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.

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.

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

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

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.

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

OneGeology is an international initiative of the world's geological surveys and other international and regional geoscience organizations. Its aim is to provide access to global geoscience data via web services underpinned by commonly used geodata standards.

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.

Online versions of selected maps and mapping products in the USGS Open-File series (nonpermanent, unpublished manuscript reports, maps, and other material that are made available for public consultation at depositories) from 1970 to the present.

The USGS Publications Warehouse provides access to over 170,000 publications written by USGS scientists over the century-plus history of the bureau.

The USGS World Energy Project conducts geologic studies that provide an understanding of the quantity, quality, and geologic distribution of world oil and gas resources. These geologic studies are conducted in an impartial manner and are performed in collaboration and partnership with energy experts within and outside government.