1. USGS Thesaurus
CMECS > Substrate > Geologic Substrate > Unconsolidated Mineral Substrate > Coarse Unconsolidated Substrate > Gravel
Boulder
Substrate Subgroup: Geologic Substrate contains > 80% Gravel, with a median Gravel size of 256 millimeters to < 4,096 millimeters.
Subtopics
(none)
See also
(none)
JSON
XML