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Sample Type is Metamorphic

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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD025MS0 Amphibolite Two large cut pieces measuring ~11x6x6 cm and ~11x6x4 cm from the cut face. Bag of rock chips. Occasional green crystals in green fine-grained matrix with patchy Fe-Mn crust. Billet. Pacific Ocean 2 Ritter 154, 37 E
GRD025QS0 Serpentinite Two cut pieces measuring ~6x6.5x6 cm and ~6x7x1.5 cm from the cut faces. One uncut sample measuring ~6x6x2 cm. Light and dark green crystalline interior with patchy Fe-Mn crust. Interior shows dark green spots in blue-green crystalline matrix. Billet and billet pieces. Original label: 21 September, 1975. Pacific Ocean 1 Ritter 154, 37 E
GRD025RS0 Serpentinite One cut sample measuring ~4.5x3x3 cm on the cut face. Blue-green crystalline interior with a single white serpentine vein. Sample has patchy white crust. Billet and billet pieces. Original label: 21 September, 1975. Pacific Ocean 2 Ritter 154, 37 E
GRD025SS0 Serpentinite One cut sample measuring ~4.5x3x3 cm on the cut face. Blue-green crystalline interior with brown patch (Fe-oxide staining?). Billet and billet pieces. Original label: 21 September, 1975. Pacific Ocean 1 Ritter 154, 37 E
GRD025TS0 Serpentinite One cut sample measuring ~7x8.5x7 cm on the cut face. Blue-green crystalline interior with abundant tan/brown chrysotile. Patchy Fe-Mn crust on sample. Billet and billet pieces. Original label: 27 October, 1975. Pacific Ocean 1 Ritter 154, 37 E
GRD025XS0 Amphibolite Two uncut samples measuring ~4x2x2 cm and ~3x2x2 cm from the cut face. Dark green crystalline interior. Billet. Original label: Blue-green hornblende, amphibolite. Pacific Ocean 2 Ritter 154, 37 E
GRD025YS0 Amphibolite Two cut samples measuring ~3x2x1 cm and ~3.5x1.5x0.5 cm from the cut face. Four small uncut pebbles in a bag. Dark green crystals in white powdery matrix. Billet. Original label: 27 October, 1975. Pacific Ocean 1 Ritter 154, 37 E
GRD0260S0 Amphibolite Small uncut sample composed of dark green amphibole and white/clear quartz. Pacific Ocean 0 Ritter 154, 37 E
GRD0261S0 Amphibolite Abundant blue-green amphibole with occasional Fe-oxide rust crystals and dark grey cubes of magnetite. High specific gravity. Pacific Ocean 1 Ritter 154, 37 E
GRD0262S0 Serpentinite Two small cut (~4x3x3 cm and ~3.5x3.5x3 cm on cut faces) green samples. Darker wispy lenses of magnetite in light green groundmass. Patchy Fe-Mn crust on sample. Billet piece. Pacific Ocean 0 Ritter 154, 37 E
GRD0263S0 Serpentinite Two cut samples (~5x3x1.5 cm and ~5x5x4.5 cm on cut faces). Wispy lenses of magnetite in light green matrix. Billet pieces. Similar to ERDC08-27D-Q. Pacific Ocean 1 Ritter 154, 37 E
GRD0264S0 Serpentinite Four small samples: two are cut, two are not cut. The largest measures ~4x3x2.5 cm. Green interior with occasional tan chrysotile crystals. Patchy Fe-Mn crust on sample. Pacific Ocean 0 Ritter 154, 37 E
GRD0265S0 Serpentinite Sample missing. Thin section only. Pacific Ocean 1 Ritter 154
GRD0266S0 Serpentinite Two large cut pieces. Coarse-grained, blue crystalline interior with occasional small pink spots (feldspar?) near the rim of the sample. Patchy Fe-Mn crust. Billet pieces. Pacific Ocean 1 Ritter 154, 37 E
GRD0269S0 Serpentinite Four pieces: two cut, two uncut. The largest cut sample measures ~6.5x3.5x2 cm from the cut face. Dark green crystalline interior with visible plagioclase laths. Patchy Fe-Mn crust on sample. Billet pieces. Original label: 28 March, 1975. Pacific Ocean 0 Ritter 154, 37 E
GRD026KS0 Serpentinite Large (measures ~8x6x4 cm from the cut face) sample with crystalline interior composed of blue feldspar, green serpentine, and dark pyroxene. Billet and billet pieces. Original label: 21 September, 1975. Pacific Ocean 1 Ritter 154, 37 F
GRD026LS0 Serpentinite Five small uncut samples (~4x2x2 cm). Chips in samples reveal a green medium-grained and fibrous interior. Original label: 29 March, 1975. Pacific Ocean 0 Ritter 154, 37 F
GRD026PS0 Serpentinite Small sample measuring ~4.5x2x4.5 from on the cut face. Medium-grained crystalline interior with abundant greenish pyroxene and serpentine. Billet. Original label: 21 September, 1975. Pacific Ocean 1 Ritter 154, 37 F
GRD027AS0 Serpentinite Large (~8x5x4 cm) green sample with abundant thin white calcite veins. Sample has high specific gravity. Billet. Pacific Ocean 0 Ritter 154, 37 G
GRD027HS0 Serpentinite Fine-grained blue crystalline sample with some green patches. Sample is cut and has high specific gravity. Billet and billet pieces. Original label: 21 October, 1967. Section cut July, 1971. Pacific Ocean 0 Ritter 154, 37 G
GRD027IS0 Serpentinite Fine-grained blueish crystalline sample with some green patches, and Fe-staining. Sample is cut and has high specific gravity. Original label: 21 October, 1967. Section cut July, 1971. Pacific Ocean 0 Ritter 154, 37 G
GRD027MS0 Serpentinite Three samples: two of which are green, fine-grained, and have occasional white feldspar crystals. The third sample is fine-grained, reddish with some patchy green serpentine. Pacific Ocean 0 Ritter 154, 37 G
GRD027OS0 Serpentinite Two cut samples. The smaller sample has white carbonate blebs in a dark green, fine-grained matrix with some thin white carbonate veins/fractures. The larger sample has some red staining on the surface and along a vein. Original label: 21 October, 1967. Section cut July 1971. Larger samples original description: Variolite basalt diabase, CO2, and zeolites. Near shore facies. Pacific Ocean 1 Ritter 154, 37 G
GRD027PS0 Serpentinite Two cut samples. White blebs in a dark green, fine-grained matrix. Some thin veins/fractures. The dark grey patches are magnetite. High specific gravity. Original label: 21 October, 1967, Section cut July 1971. Pacific Ocean 1 Ritter 154, 37 G
GRD027QS0 Serpentinite Two cut samples. Grey, fractured blebs in a dark grey, fine-grained matrix. Some thin veins/fractures. White and blue serpentine on the surface. Original label: 21 October, 1967, Section cut July 1971, Sheared serpentinite/harzbergite. Pacific Ocean 1 Ritter 154, 37 G
GRD027TS0 Serpentinite Two cut samples (largest measures ~4.5x4x3 cm). Fine-grained dark grey/green samples with occasional dark green spots. Original label: 21 October, 1967, Section cut July 1971 Pacific Ocean 1 Ritter 154, 37 G
GRD027VS0 Serpentinite Billet and thin section only - dark blue/red fine-grained. Pacific Ocean 1 Ritter 154, 37 G
GRD0281S0 Serpentinite Two small (~4x3x2 cm from cut face) and five very small (largest is ~2x1x1 cm) blue-green crystalline samples with a few dark spots (pyroxene?). All samples are cut. Original label: 21 October, 1967. Section cut: Nov 1967. Pacific Ocean 0 Ritter 154, 37 G
GRD0288S0 Serpentinite Five cut samples (largest measures ~5.5x5.5x1.5 cm from the cut surface). Green crystalline to fine-grained. Dark blue and light green serpentine on the surface. One sample looks more like a peridotite than a serpentinite- (misplaced?). All samples have occasional magnetite crystals. Billet and billet pieces. Pacific Ocean 0 Ritter 154, 37 H
GRD028AS0 Serpentinite One small cut sample (~2.5x3x2.5 cm from the cut surface). Green crystalline with light green serpentine on the side of sample. Billet pieces. Pacific Ocean 0 Ritter 154, 37 H