Pinon Peak breccia pipes

occurrence of asbestos in Fremont county, CO

Geologic information

Name of sitePinon Peak breccia pipes
Developmentoccurrence
StateCO
CountyFremont
Geographic location:-105.4768, 38.4057
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Fibrous mineralcrocidolite
Associated mineralsquartz
orthoclase
sodic plagioclase
aegirine
rutile
calcite
chlorite
ferruginous clay mineral
phlogopite
hematite
biotite
Host rock typeslamprophyre breccia pipes
Geologic map unit-105.4768, 38.4057
Nearby scientific dataFind additional scientific data near this location

Reference information

Heinrich, E.W., and Dahlem, D.H., 1967, Carbonatites and alkalic rocks of the Arkansas River area, Fremont County, Colorado--4, The Pinon Peak breccia pipes: American Mineralogist, v. 52, nos. 5-6, p. 817-831.
[http://www.minsocam.org/ammin/AM52/AM52_817.pdf]
Taylor, R.B., Scott, G.R., Wobus, R.A., and Epis, R.C., 1975, Reconnaissance geologic map of the Royal Gorge quadrangle, Fremont and Custer Counties, Colorado: U.S. Geological Survey Miscellaneous Investigations Series Map I-869, 1 sheet, scale 1:62,500.
[http://pubs.er.usgs.gov/publication/i869]