Mineral Resources On-Line Spatial Data: petrology

Mineral Resources On-Line Spatial Data

Petrology

Branch of earth sciences concerned with the origin, structure, alteration, and composition of rocks.

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Cretaceous magmatic rocks of Alaska [New Window]: Data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier, published (at 1:2,500,000 scale) in volume G-1 of "The Geology of Alaska" (GSA)
Generalized thermal maturity map of Alaska [New Window]: Data derived from the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, published in USGS Bulletin 2142. Combines vitrinite reflectance and conodont alteration index in generalized units.
Geochemical database for the Boulder Batholith and its satellitic plutons, southwest Montana [New Window]: Geochemical analyses of Cretaceous igneous intrusions in order to establish the geologic framework for world-class mineral deposits of the Butte district