GRD00FOS0
I-649
Gabbro
Precambrian › Proterozoic › Mesoproterozoic › Stenian
1000.0
-
1200.0
0
Ritter 154 › Cabinet 16 › Drawer F
polished
Polsihed slab. Feldspars are labradorite with bytownite intergrowths. Original description: Leucogabbro (bytownite-Px).
(see Elkins and Grove, Am. Mineral., 1990)
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Minnesota
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