Global Volcanism Program
The Smithsonian's map and database of the world's volcanoes and eruptions
PBDB Navigator: map of fossil finds through time, on ancient continents. Here are 17 other maps that do a similar job, 17 of them completely free.
The Smithsonian's map and database of the world's volcanoes and eruptions
Geologic map of the whole world, combining hundreds of maps
See where your town was on Earth hundreds of millions of years ago
Free topographic map of the world from OpenStreetMap and elevation data
Follow a raindrop from anywhere to the sea
Free elevation and topographic maps for anywhere
Volcano news, active volcano map and earthquake reports
Geology of Britain from the British Geological Survey
Geological maps from geological surveys around the world in one viewer
Browse every published geologic map of the United States
Elevation map that shows what floods at a given water level
The mineral database, with maps of where minerals are found
The Smithsonian's map and database of the world's volcanoes and eruptions
Geologic map of the whole world, combining hundreds of maps
See where your town was on Earth hundreds of millions of years ago
Free topographic map of the world from OpenStreetMap and elevation data
Follow a raindrop from anywhere to the sea
Free elevation and topographic maps for anywhere
Volcano news, active volcano map and earthquake reports
Geology of Britain from the British Geological Survey
Geological maps from geological surveys around the world in one viewer
Browse every published geologic map of the United States
Elevation map that shows what floods at a given water level
The mineral database, with maps of where minerals are found
Seafloor depth and bathymetry surveys from NOAA
High-resolution lidar and elevation data, searchable on a map
Global maps of soil properties at 250-metre resolution
Official US soil maps and reports for any area
Japan's nationwide 1:200,000 seamless geological map