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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD02O4S0 Quartzite Two very different samples. One is a dark fine-grained marble. The other is a light fine-grained marble. Original description: Marble. Schist pendant. California 1 Camp Elliott
GRD02O5S0 Quartzite Fine-grained quartzite. Original description: Siliceous schist. Schist pendant. California 2 Camp Elliott
GRD02O6S0 Granodiorite Medium-grained granodiorite. Orthoclase-quartz-amphibole-biotite California 2 Ritter 154, 15 N
GRD02O7S0 Calcsilicate (Skarn) Banded hornfels. The lighter layers appear to be more siliceous. California 0 Camp Elliott
GRD02O8S0 Blueschist Blueschist with thin white carbonate veins cross-cutting the foliation. Some green mineralization on surface. Portion of a cobble. California 4 Ritter 154, 3 G
GRD02O9S0 Diorite Original description: Hornblende diorite. 3/4 thin sections California 4 Ritter 154, 3 E
GRD02OAS0 Folds Two very large pieces of folded, bedded sample of marble and quartzite. The more granular beds are marble whereas the darker, more finely-grained beds are quartzite. Original description: Marble. California 2 Ritter 154, 24 I
GRD02OBS0 Folds No hand sample. Thin section only. Original description: Blastomylonite - fault zone material showing effects of extreme cataclasis and recrystallization. Note the layering showing different extents of granulation. California 1 Ritter 154, 29 A
GRD02OCS0 Welded Ignimbrite Bishop Tuff. Dark brown fiamme mantled by black rims with rounded quartz crystals in pink groundmass. Quartz and garnet-rich xenolith. California 2 Ritter 154, 3 E
GRD02ODS0 Welded Ignimbrite Bishop Tuff. Dark brown fiamme mantled by black rims with rounded quartz crystals in pink groundmass. Hypocrystalline. California 5 Ritter 154, 3 F
GRD02OES0 Diorite Plagioclase-biotite-quartz-oxide diorite. Missing TS box California 4 Ritter 154, 15 P
GRD02OFS0 Granodiorite 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. California 4 Ritter 154, 3 F
GRD02OGS0 Granodiorite Medium grain light colored granite with Biotite (2-3 mm), Plagioclase (1-10 mm), Quartz (1-3 mm), K-spar (1-10 mm). Color Index: 5. Original Description: Two samples (one is a cut slab) of light colored, coarse-grained granite. California 0 Ritter 154, 3 E
GRD02OGS1 Granodiorite Medium grain light colored granite with Biotite (2-3 mm), Plagioclase (1-10 mm), Quartz (1-3 mm), K-spar (1-10 mm). Color Index: 5. Original Description: Two samples (one is a cut slab) of light colored, coarse-grained granite. Thin sections with S0 sample. California 0 Ritter 154, 15 I
GRD02OHS0 Diorite One cut slab of fine-grained diorite California 4 Ritter 154, 15 P
GRD02OIS0 Quartzite Very small sample of fine-grained gray and Fe-stained quartzite. California 3 Ritter 154, 14 L
GRD02OJS0 Quartzite Very small sample of fine-grained gray and Fe-stained quartzite. Faint laminations. California 3 Ritter 154, 14 L
GRD02OKS0 Gabbro Large sample of hornblende gabbro. Original label: From blasted outcrop in road. California 2 Ritter 154, 16 D
GRD02OLS0 Gabbro Two samples of anorthositic gabbro. Exsolution of pyroxenes in thin section. California 3 Ritter 154, 16 F
GRD02OMS0 Serpentinite Small green sample of serpentinite with carbonate veins. Pillow margin. Franciscan. California 3 Ritter 154, 14 M
GRD02ONS0 Serpentinite Small green sample of serpentinite with carbonate veins. Pillow margin. Franciscan. California 3 Ritter 154, 14 M
GRD02OOS0 Greywacke Very small grey sample of fine- to medium-grained greywacke. Franciscan. California 3 Camp Elliott
GRD02OPS0 Greywacke Small grey sample of fine- to medium-grained greywacke. Franciscan. California 0 Camp Elliott
GRD02OQS0 Non-layered Gneiss Foliated sample with large clasts of feldspar and hornblende. Mica-poor. Original label: Meta-tuff? Stage 1. California 3 Ritter 154, 14 A
GRD02ORS0 Schist Schist with large clasts of feldspar. Feldspar-quartz-biotite. Original label: Meta-tuff? Stage 2. California 3 Ritter 154, 14 D
GRD02OSS0 Quartzofeldspathic Small sample of fine-grained gneiss. Thin, poorly developed bands in gniess. Feldspar-quartz-biotite. Original label: Meta-tuff? Stage 3. California 3 Ritter 154, 24 A
GRD02OTS0 Calcsilicate (Skarn) Very small, very fine-grained sample. Original label: Meta-tuff? - Hornfels?. California 3 Camp Elliott
GRD02OUS0 Quartzofeldspathic Two small, dark, very fine-grained samples. Original label: Meta-tuff? - Hornfels?. California 3 Camp Elliott
GRD02OVS0 Granite Small sample of fine to medium-grained pink granite. Original label: Granitic aplite dikes intrusive into meta-tuffs Calif 1039-1041. California 1 Camp Elliott
GRD02OWS0 Diorite Large sample of quartz-rich diorite. Quartz-hornblende-biotite. Original label: Quartz diorite. California 3 Ritter 154, 15 P