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Sample Type is Metamorphic › Granoblastic › Marble › Impure Marble

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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD0014S0 Impure Marble Fine-grained brown marble. Nice relict laminae. Micrite protolith? Original description: Limestone. Horizontal recrystallized laminae. California 1 Ritter 154, 14 J
GRD01Y4S0 Impure Marble Coarse-grained calcite with small metallic oxide crystals; some oxides have a rust halo while others do not. Perhaps the latter is molybdenite?. See also M-59 and M-211 0 Ritter 154, 14 J
GRD01Y5S0 Impure Marble Coarse-grained calcite with small metallic oxide crystals. Some oxides have a rust halo while others do not. Perhaps the latter is molybdenite?. See also M-58 and M-211. Original description: calcitic marble. New York 0 Ritter 154, 14 J
GRD01YDS0 Impure Marble Large slabby, fine-grained, foliated sample. Perhaps some relict bedding (low-grade metamorphism). Possibly from an impure limestone (marl?). Mylonite?. Original label: Penn Limestone. California 0 Ritter 154, 14 J
GRD01YMS0 Impure Marble Small sample of a coarse-grained marble. Nice cleavage faces on calcite and muscovite. Books of muscovite and small metallic flecks (trace). See also M-58 and M-59. 0 Ritter 154, 14 J
GRD01YNS0 Impure Marble Calcite-phlogopite-muscovite-plagioclase-quartz marble. Generally coarse-grained. Poorly foliated with granoblastic texture. Alpine 5 Ritter 154, 3 H
GRD01YOS0 Impure Marble Fine-grained grey and white marble. Relict bedding or structure? Large, euhedral oxidized pyrite porphyroblasts. Original description: dolomite marble, contains sulfides. 0 Ritter 154, 14 J
GRD01ZZS0 Impure Marble Marble with relict bedding. The light beds are composed of carbonate. The dark beds are carbonaceous carbonate. Some Fe-staining along fractures. Original description: carbonaceous marble. California 0 Ritter 154, 14 J
GRD02O0S0 Impure Marble Small sample of marble. Portions of marble are white, brown, and green. Original label: Marble. Schist pendant. California 0 Camp Elliott