A foliated rock formed by regional metamorphism, in which bands or lenticles of granular minerals alternate with bands or lenticles in which minerals having flaky or elongate prismatic habits predominate. Generally less than 50% of the minerals show preferred orientation.
This category is also used for mica gneiss.
Orthogneiss (1 items)

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Geochemical re-analysis of rock and sediment samples from the Lower Middle Fork of the Salmon River collected as part of the Idaho Primitive Area Studies in the 1960's through 1980's

Geochemical data from the re-analysis of 44 rock samples collected between 1966 and 1970, and 107 sediment samples collected in 1966 and 1967 for a study investigating the mineral resources of this area. Data are provided in CSV format.

Mica deposits of the Blue Ridge in North Carolina

Point locations with characteristics of mines and prospects.

Gravity and magnetic studies of the eastern Mojave Desert, California and Nevada

Report with generalized interpretation and Excel tables of gravity and physical property data including an explanations of their formats.

Reconnaissance geologic map of the Kuskokwim Bay region, southwest Alaska

A geologic map constructed primarily from reconnaissance studies from the 1950s to 1990s. The rocks of the map area range from Proterozoic age metamorphic rocks of the Kanektok metamorphic complex to Quaternary age mafic volcanic rocks of Nunivak Island.

Whole Rock Density, Magnetic Susceptibility, and Radiometric Measurements of a Rare Earth Element Terrane, Southeastern Mojave Desert.

Rock property measurements including density, magnetic susceptibility, and radiometric concentrations to understand structural and geophysical relationships associated with rare earth element mineral deposits. Data are provided in CSV format.