GRD02OFS0

Calif 1011

Granodiorite

Mesozoic › Cretaceous
65.5 - 145.5

4

Ritter 154 › Cabinet 3 › Drawer F

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Coarse-grained Granodiorite containing Plagioclase, K-spar, Quartz, Hornblende, Biotite, trace Sphene and other Opaques. Original Description (Eichler?): El Capitan Granite. Pale, coarse-grained granite.

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California
El Capitan, Yosemite Valley, Mariposa county
Latitude: 37.707°
Longitude: -119.614°

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Slide 1: Perthitic feldspar

5.0

plane

Slide 1: Perthitic feldspar

5.0

crossed

Slide 1

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crossed

Slide 1

scan

plane

Slide 2

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crossed

Slide 2

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plane

GRD02OFT0: Calif 1011 (1): 45% Plag, 20% Quartz, 20% K-spar, 8% Amphibole(Hbl), 5% Biotite, 2% Opaques, Trace Sphene. Michel-Levy tests indicates Oligoclase composition Plag. Plagioclase shows zoning, Myrmekitic texture observed. (S. Curran)

GRD02OFT1: Calif 1011 (2): 45% Plag, 20% Quartz, 20% K-spar, 8% Amphibole(Hbl), 5% Biotite, 2% Opaques, Trace Sphene. Michel-Levy tests indicates Oligoclase composition Plag. Plagioclase shows zoning, Myrmekitic texture observed. (S. Curran)

GRD02OFT2: Calif 1011 (3): 45% Plag, 20% Quartz, 20% K-spar, 8% Amphibole(Hbl), 5% Biotite, 2% Opaques, Trace Sphene. Michel-Levy tests indicates Oligoclase composition Plag. Plagioclase shows zoning, Myrmekitic texture observed. (S. Curran)

GRD02OFT3: Calif 1011 (4): 45% Plag, 20% Quartz, 20% K-spar, 8% Amphibole(Hbl), 5% Biotite, 2% Opaques, Trace Sphene. Michel-Levy tests indicates Oligoclase composition Plag. Plagioclase shows zoning, Myrmekitic texture observed. (S. Curran)

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