This Webapp can be used to visualize and explore the inventory of published USGS 3D geological models. The inventory covers the time period from 2004 through 2022. The geological models vary widely in their spatial extent, type, purpose, number of subsurface units characterized, and software platforms used to create the models. Some of these characteristics can be explored through this viewer. These data were compiled as part of ongoing development of subsurface geologic information by the USGS National Cooperative Geologic Mapping Program.