Results: 1 - 4 of 4
Dec 31, 1979
Open File Report
… km 2 . A study of the sand and gravel resources of the area was … of these rivers contain coarse gravel and coarse sandy gravel which is as much as 20 m …
Jan 23, 2020
Data
… peat, humalite, and sand and gravel, as well as minerals that … rare earth elements, salt, sand/gravel, silica sand, silver, stone, … such as peat, stone, sand and gravel, bromine, iodine, and marl …
Jan 23, 2020
Map
… rare earth elements, salt, sand/gravel, shale, silica sand, stone, …
Dec 31, 1968
Earth Sciences Report
… Formation are beds of marl, gravel, sand, and conglomerate. The …