Rock Units

Layer thumbnail

Comments: Rock units can include both groups and individual formations.

Data Source: Geologic Database of Texas

Click a rock unit on the map to view more information.

Members

Layer thumbnail

Comments: Groups and individual formations can be further subdivided into smaller units called members.

Data Source: Geologic Database of Texas

Click a member on the map to view more information.

Faults
Legend Image Anticline
Legend Image Concealed Normal
Legend Image Inferred Normal
Legend Image Normal
Legend Image Overturned Anticline
Legend Image Overturned Syncline
Legend Image Syncline
Legend Image Thrust
Legend Image Transverse (From-To)
Legend Image Transverse (To-From)
Legend Image Unspecified

Comments: Faults are depicted as arrows showing relative movement.

Data Source: Geologic Database of Texas

Click a fault on the map to view more information.

Map Sheets
Source map sheet

Comments: The Geologic Database of Texas was digitized from the Geologic Atlas of Texas (GAT) . This map layer shows the boundaries of these source map sheets. Sheet names are labeled on the map.

Data Source: Geologic Database of Texas

Click a sheet on the map to view more information.

Geolocation
Your approximate location

Comments: The geologic features presented are 1:250,000-scale and may have a different level of locational accuracy than your marked location.

Click the marker to zoom to your location.

Base Map: Imagery
Layer thumbnail

Comments: This base map provides 0.3-meter-resolution satellite and aerial imagery in the continental United States.

Data Source: ESRI ArcGIS Online

Base Map: Topographic
Layer thumbnail

Comments: This base map includes administrative boundaries, cities, water features, physiographic features, parks, landmarks, highways, roads, railways, and airports.

Data Source: ESRI ArcGIS Online