Geology and Beryl Deposits of the Peerless Pegmatite, Pennington County, South Dakota; Geological Survey Professional Paper 297-A

by Douglas M. Sheridan, Mortimer H. Staatz, Hal G.

$15 · Offered by Crossroads Books

Washington: United States Government Printing Office, 1957. softcover, 11 x 8.5 , 47 pages, Plates 4-7 folded inside rear pocket, text loose from cover, good. Item #5569256 from the abstract, 'The Peerless pegmatite half a mile of Keystone, Pennington County, *. Dad., has been a major source of scrap mica and beryl. Feldspar, amblygonite-montebrasite, tantalite-columbite, and cassiterite also have been

• Binding: Softcover

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