Pavement of smoothly rounded quartzite pebbles let down on clay shale slope by erosion from Miocene(?) upland gravel.
Dates
Date Taken
1916
Summary
Pavement of smoothly rounded quartzite pebbles let down on clay shale slope by erosion from Miocene(?) upland gravel. Valley County, Montana. August 24, 1916.
Summary
Pavement of smoothly rounded quartzite pebbles let down on clay shale slope by erosion from Miocene(?) upland gravel. Valley County, Montana. August 24, 1916.
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