actinolitic slates and schists

outcrops of asbestos in Marquette county, MI

Geologic information

Name of siteactinolitic slates and schists
Developmentoutcrops
StateMI
CountyMarquette
Geographic location:-87.3906, 46.5066
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Fibrous mineralIn plagioclase-rich layers, fibrous actinolite grows along cleavage and twin planes in the plagioclase and apparently formed by replacement of plagioclase"" (Gair and Thaden, 1968, p. 13).
Associated mineralssodic plagioclase
carbonates
magnetite
quartz
secondary iron oxides
Host rock typesactinolitic slates and schists
Geologic map unit-87.3906, 46.5066
Nearby scientific dataFind additional scientific data near this location

Reference information

Gair, J.E., and Thaden, R.E., 1968, Geology of the Marquette and Sands quadrangles, Marquette County, Michigan: U.S. Geological Survey Professional Paper 397, 77 p., 7 plates.
[http://pubs.er.usgs.gov/publication/pp397]