Results: 1 - 4 of 4
May 06, 2007
Map
… Geological Survey sand and gravel geology and resource data … the areal extent of sand and gravel deposits with aggregate … the material (ratio of sand to gravel and amount of fines) in the …
Apr 07, 2016
Presentation
… extensive bedrock plateaus are gravel-capped, which will influence …
Apr 23, 2017
Data
… 3, which contains sand and/or gravel resting on the floors of …
Apr 23, 2017
Data
… 5, which contains sand and/or gravel confined to modern valleys, …