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Filters Date Types (for Date Range) Types (Less) Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts (Less) U.S. Geological Survey Bastin, Edward Sunderland Categories (Less) Image (1) Tag Schemes http://www.sciencebase.gov/vocab/undefined/DenverHistoryPhotoLibrary/Categories (1) Tags (with Type=category ) photographers (1) specimens (1) View Results as: JSON ATOM CSV

Specimens showing injection gneiss formed by intimate intrusion of quartz biotite schist of the Idaho Springs formation by granite pegmatite. Gilpin County, Colorado. Circa 1911. Specimens showing injection gneiss formed by intimate intrusion of quartz biotite schist of the Idaho Springs formation by granite pegmatite; taken from dump of Golden Rod tunnel, Silver Creek. Gilpin County, Colorado. Circa 1911. Plate 10-B, natural size, in U.S. Geological Survey Professional Paper 94. 1917. Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bastin, E.S. Collection, Gilpin County, Colorado, Photographers, Specimens, photo print