GRD01UUS0
M-111
Augen Gneiss
Mesozoic › Cretaceous › Late Cretaceous
65.5
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99.6
0
Ritter 154 › Cabinet 14 › Drawer A
quartzofeldspathic,augen
Plagioclase-quartz-amphibole-biotite-garnet. Medium- to coarse-grained. Gradation from schist to gneiss. Gneiss has potassium feldspar augen and banding. See also M-110.
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California
South end of the Coyote Mountains, Borrego Springs
Latitude: 33.304134°
Longitude: -116.299381°
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N/A
N/A
N/A
Theodore_GSAB_1970
Theodore, T. (1970) Petrogenesis of Mylonites of High Metamorphic Grade in the Peninsular Ranges of Southern California: Geological Society of America Bulletin, v. 81, p. 435-450.