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February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Studies of sillimanite-grade Proterozoic rocks, particularly mafic and ultramafic intrusive bodies; local and statewide volume weighted chemistry; and comparison of local crust-muntle chemical models with Earth crust-muntle chemical models.
"Mineral Resource Potential and Geology of the Routt National Forest and the Middle Park Ranger District of the Arapaho National Forest, Colorado" is a research paper edited by Viki Bankey, Sandra J. Soulliere and Margo I. Toth. The paper was originally published as no. 1610 of the "U.S. Geological Survey Professional Paper" series. The U.S. Geological Survey presents a downloadable version in PDF format of the paper online. This report discusses the potential for as yet undiscovered mineral and energy resources within the forest.