GRD02N7S0
Calif 17
Andesite
Cenozoic › Quaternary › Pleistocene › Calabrian
0.01
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1.8
7
Ritter 154 › Cabinet 3 › Drawer F
porphyritic seriate
Amphibole-Plagioclase-phyric, speckled black and gray, massive seriate Andesite. Sub/Euhedral prismatic Amphibole (1-3 mm), sub/euhedral plagioclase (1-5 mm). Original Description: Andesite bearing large feldspar and amphibole crystals. 6/7 thin sections present
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California
Marysville Buttes (old name for Sutter Buttes) near Chico from mudflow breccias, Sutter County
Latitude: 39.22°
Longitude: -121.82°
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scan
plane
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scan
crossed
GRD02N7T0: Calif-17-1: 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T1: Calif-17-2: 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T2: Calif-17 (3) : 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T3: Calif-17 (4): 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T4: Cal-17 (5): 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T5: Cal-17 (6): 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
GRD02N7T6: Cal-17 (7): 75% Amphibole, 20% Plagioclase (Andesine/Labradorite), 5% Biotite. Plagioclase shows Carlsbad-albite twinning and at times concentric zoning. (S. Curran)
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