GeoTherm Atlas

Your portable geological survey station. Join the Underground Survey Association to delve deep beneath the surface—layer by layer—and create missions for cave, geothermal, and deep-subsurface exploration. Record temperatures, collect samples, document rock strata, and keep field logs to automatically build your personal geological archive. With nine levels of exploration certification, achievement tracking, and annual reports, witness your complete journey from novice observer to Chief Surveyor.