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Granite Augen Gneiss

By Geology, Geophysics, and Geochemistry Science Center 2015 (approx.)
granitoid
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Detailed Description

Mesoproterozoic granite augen gneiss at Napias Creek, east-central Idaho. Cover image from USGS Data Series 942.

Sources/Usage

Public Domain.

USGS Data Series 942
du Bray, E.A., Holm-Denoma, C.S., San Juan, C.A., Lund, Karen, Premo, W.R., and DeWitt, Ed, 2015, Geochemical, modal, and geochronologic data for 1.4 Ga A-type granitoid intrusions of the conterminous United States: U.S. Geological Survey Data Series 942, 19 p., https://doi.org/10.3133/ds942.