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Sample Type is Igneous › Plutonic › Intermediate Intrusive

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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD026TS0 Diorite Cut sample (~5x4x5 cm) with light green crystalline interior, cross-cutting white veins and occasional red blebs. Patchy sandy rind on sample. Billet and billet pieces. Original label: 27 October, 1975. Pacific Ocean 1 Ritter 154, 37 F
GRD026XS0 Diorite Cut sample (measures ~5x5x1.5 cm from the cut face). Dark grey fine-grained interior. Billet. Billet pieces. Original label: 21 September, 1975. Pacific Ocean 1 Ritter 154, 37 F
GRD026YS0 Diorite Cut sample (measuring 3x2x1.5 cm on the cut face). Dark grey fine-grained interior, visible green and black crystals visible. Billet. Original label: 27 October, 1975. Pacific Ocean 1 Ritter 154, 37 F
GRD02N0S0 Diorite Fine- to medium-grained. Quartz-biotite-plagioclase-vesuvianite. Weakly foliated. California 0 Ritter 154, 19 E
GRD02NCS0 Granodiorite 2.5 cm aplite dike cutting granodiorite. Original description: Aplite dike cutting weakly foliated granodiorite atp(?) Also mafic hornfels inclusions and streamers. California 0 Ritter 154, 16 Q
GRD02O6S0 Granodiorite Medium-grained granodiorite. Orthoclase-quartz-amphibole-biotite California 2 Ritter 154, 15 N
GRD02O9S0 Diorite Original description: Hornblende diorite. 3/4 thin sections California 4 Ritter 154, 3 E
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
GRD02OWS0 Diorite Large sample of quartz-rich diorite. Quartz-hornblende-biotite. Original label: Quartz diorite. California 3 Ritter 154, 15 P
GRD02PIS0 Diorite Diorite. Thin section only. No hand sample. Original label: Quartz diorite. California 2 Ritter 154
GRD02Q5S0 Granodiorite Giant Forest Pluton (Kspar, Q, biotite) California 0 Ritter 154, 15 O
GRD02QNS0 Granodiorite Mt. Stuart batholith Washington 0 Ritter 154, 19 K
GRD02QOS0 Granodiorite May contain enough Quartz to classify as Tonalite Washington 0 Ritter 154, 15 P
GRD02QQS0 Diorite 50% plag, 15% hornblend, 20% quartz,10% biotite, 3% Kspar, 2% sphene and ap. Some opaques. California 1 Ritter 154, 19 E
GRD02QRS0 Granodiorite Plag>quartz>amphibole Accessory minerals: Oxide, chlorite, K-spar Fiji 3 Ritter 154, 19 K
GRD02QTS0 Diorite California 2 Ritter 154, 15 P
GRD02QXS0 Granodiorite Probably typical of the main rock type here US-40 Donner Pass 8/99 approximately at bridge, overlook 1 Ritter 154, 15 O
GRD02QYS0 Diorite California 5 Ritter 154, 15 P
GRD02R7S0 Granodiorite 10 Kspar, 40 plag, 5 amphibole, 40 quartz, 5 biotite + sphene 0 Ritter 154, 15 N
GRD02RSS0 Diorite One 1cm thick slab. Coarse grained, weathered, Plagioclase, Quartz, Hornblende, Biotite, trace K-spar apatite and sphene, minor chlorite Point Reyes CA, from N end of point, from the Salinian block. 4 Ritter 154, 3 E
GRD02RYS0 Diorite Medium grained, Quartz, Plag, Hornblende, Biotite. 0 Ritter 154, 3 E
GRD02RZS0 Granodiorite Washington 3 Ritter 154, 3 E
GRD02SFS0 Intermediate Intrusive 20-5-% plag, under 15% Hb, under 5% cpx. La Sal Loop Rd. In northern La Sal mountains E of Moab. 0 Ritter 154, 19 K
GRD02SGS0 Intermediate Intrusive 20-5-% plag, under 15% Hb, under 5% cpx. La Sal Loop Rd. In northern La Sal mountains E of Moab. 0 Ritter 154, 14 L
GRD02U5S0 Diorite Biotite, Plagioclase, Amphibole bearing - Diorite(?). Original Label : Mafic phase, probably equivalent to enclaves in granodiorite 8/99 California 1 Ritter 154, 15 P
GRD02U6S0 Granodiorite Granodiorite with magic enclave. There is a 10-20 meter wide zone of enclave filled granodiorite here forming band within granodiorite. See also Ca 1270. 8/99 California 1 Ritter 154, 15 N