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https://www.nps.gov/iafl/index.htm
Ice Age Floods National Geologic Trail (U.S. National Park Service)
At the end of the last Ice Age, 18,000 to 15,000 years ago, an ice dam in northern Idaho created Glacial Lake Missoula stretching 3,000 square miles around...
ice age floodsnational geologictrail upark service
https://ngmdb.usgs.gov/ngmdb/ngmdb_home.html
National Geologic Map Database
USGS (U.S. Geological Survey) National Geologic Map Database
national geologic mapdatabase
https://ngmdb.usgs.gov/Info/standards/
National Geologic Map Database
USGS (U.S. Geological Survey) National Geologic Map Database
national geologic mapdatabase
https://ngmdb.usgs.gov/Geolex/search
National Geologic Map Database
USGS (U.S. Geological Survey) National Geologic Map Database
national geologic mapdatabase
https://www.nps.gov/articles/000/badl-geologic-formations.htm
Geologic Formations: How Badlands Buttes Came to Be (U.S. National Park Service)
national park servicegeologicformationsbadlandsbuttes