USGS Unveils New National Geologic Map

A Comprehensive, Interactive Web Tool for Understanding the Nation's Geology

In a significant advancement for geoscience, the U.S. Geological Survey has released the most detailed national-scale geologic map of the country to date, offering a unique regional view of geology at and beneath the Earth’s surface.

“Geologic maps have many uses, such as helping experts look for energy, mineral and water resources,” said Christopher Swezey, USGS National Cooperative Geologic Mapping Program coordinator. “They can also be used to assess earthquake risks and inform decisions about land use, infrastructure and community planning, and real estate and insurance."

Geologic maps use different colors to show various types of rocks and sediments beneath the surface. These are organized into geologic map units, which range in composition from loose sand and gravel to very old bedrock. Each unit has its own unique characteristics, such as age and composition. 

The new USGS map, called The Cooperative National Geologic Map, was created using more than 100 preexisting geologic maps from various sources and is the first nationwide map to provide users with access to multiple layers of geologic data for one location. This feature allows users to access the multiple data sources included in the map to look at or beneath the surface to understand the ancient history of the nation recorded in rocks. 

These layers can offer new insights into the geology of the nation, enabling more efficient analysis of natural hazards and geologic resources, such as potential focus areas for critical minerals vital to national security and economic development. Currently, the map covers the lower 48 States, but plans are underway to add content for Alaska, Hawaii, and the U.S. territories.