The U.S. Geological Survey (USGS) has released a new interactive map that offers a striking look at the rocks and sediments beneath every corner of the United States. The project, years in the making, marks one of the most comprehensive efforts yet to standardize geologic data across state and federal agencies.

Launched in August, the map allows users to explore the ages, types, and compositions of rock layers both at and below the surface. Each unit is categorized by characteristics such as composition or geologic age. Users can click on any region for detailed data, links to related research, and access to more localized maps.

The map represents a major step forward in modernizing how geologic information is collected, organized, and shared. Researchers say the breakthrough came from developing a mostly automated process that merges geologic maps from state surveys and the USGS, drastically cutting the time needed to compile nationwide data.

The tool is part of a larger initiative led by the Association of American State Geologists and the National Geologic Map Database. The goal is to bring consistency to geologic mapping across the country and make this information easily accessible to scientists, educators, and the public.

Beyond academic value, geologic maps serve practical purposes—from locating mineral, water, and energy resources to assessing earthquake hazards and guiding land use, construction, and infrastructure planning.

While the new map represents a significant leap in data accessibility, experts note it also highlights ongoing challenges. Differences in how states collect and report data remain visible. For instance, along the Idaho-Washington border, variations in mapping methods create a distinct contrast in the digital landscape. Rather than being errors, these inconsistencies point to opportunities for deeper collaboration between state geological surveys and federal researchers.

The USGS says the map will continue to evolve as new data are added, reflecting not only the complexity of the ground beneath us but also the growing precision of modern geoscience.