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Data Sources
Topo
Ecoregions
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BASEMAPS
Default Weather
Temperature
Smoke
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WEATHER
Upper Tertiary sediment or sedimentary rock (MTTsu;0)
Geologic Formation
in
MT
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Lithology
Conglomerate
Sandstone
Siltstone
Geologic Age
Burdigalian – Pliocene (20.44 Ma – 2.58 Ma ago)
Geologic Unit Label
Tsu
Conglomerate, tuffaceous sandstone and siltstone, marlstone, and equivalent sediment and ash beds. Local volcanic flows in southwestern Montana. Includes Sixmile Creek Formation. Dominantly fluvial, alluvial fan, mudflow, and palustrine. Composite thickness for Tsu and Tsm exceeds 4,880 m (16,010 ft).
—
USGS
Taxonomy
Geographic Places
307
Geological Feature
46
Geologic Formation
Classified As
Geologic Formation
Upper Tertiary sediment or sedimentary rock (MTTsu;0)
Upper Tertiary sediment or sedimentary rock (MTTsu;0)
Upper Tertiary sediment or sedimentary rock (MTTsu;0)
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