Geologic Atlas of the United States, Riddle Folio, Oregon

The Geological Survey is making a geologic atlas of the United States, which is being issued in parts, called Folio’s. Each folio includes topographic and geologic maps of a certain area. This folio was engraved and printed by the the U.S. Geological Survey, in 1924. This folio of Riddle was published in 1924 and has a very detailed description and explanation of the Riddle quadrangle and features topographic maps. The pages of this Atlas  are in very good condition and are all firmly connected to the binding.

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