1. USGS Thesaurus
CMECS > Substrate > Geologic Substrate > Unconsolidated Mineral Substrate > Coarse Unconsolidated Substrate
Gravel
Substrate Group: Geologic Substrate surface layer contains > 80% Gravel (particles 2 millimeters to < 4,096 millimeters diameter).
Subtopics
Boulder
Cobble
Granule
Pebble
See also
(none)
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