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Sample Type is Igneous › Volcanic › Mafic Extrusive

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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD029GS0 Basalt Large (~7x6x6.5 cm from the cut face) sample of vesicular porphyritic basalt; feldspar and pyroxene crystals are visible in the sample. Glassy top surface with some Fe-staining. White rind on the sides. Billet and billet pieces. Thin section missing. Original label: 21 August, 1968. Indian Ocean 1 Ritter 154, 34 B
GRD029HS0 Basalt Very large (~11x12x8.5 cm from the cut face) sample of vesicular porphyritic basalt. Occasional feldspar crystals are visible in the sample. Thick Fe-Mn crust on the sample. A few chips in the Fe-Mn crust reveal a glassy surface on the top of the sample. Billet. Billet pieces. Indian Ocean 0 Ritter 154, 34 B
GRD029IS0 Basalt Large (~5.5x6x4 cm from the cut face) sample of vesicular basalt. Vesicles are small. Fe-Mn crust on the sample. Billet. Billet pieces. Indian Ocean 1 Ritter 154, 34 B
GRD02AGS0 Basalt Basalt with glassy crust and plagioclase phenocrysts. Most of the glassy crust has been chipped away. 1983-03-19. Ship: Thomas Washingotn. Pacific Ocean 0 Ritter 154, 19 K
GRD02J2S0 Basalt plag phyric diabase, probably a part of the Nipissing dikes; phenocrysts up to 2cm Canada 0 Ritter 154, 15 I
GRD02J2S1 Basalt plag phyric diabase, probably a part of the Nipissing dikes; phenocrysts up to 2cm Canada 0 Ritter 154, 16 H
GRD02NIS0 Basalt Small weathered sample of basalt. Patches of more coarsely grained basalt? California 0 Camp Elliott
GRD02NUS0 Basalt Amphibole phryic basalt. Original label: Basalt dike - cutting granodiorite. California 0 Ritter 154, 20 E
GRD02PES0 Basalt Basalt capped by coarsely crystalline amphibole (?). Billets. Original label: Ophiolite. Mafic dike cutting Calif 1103 and 1104. California 2 Ritter 154, 29 F
GRD02PXS0 Basalt Vesicular basalt. Slightly stretched vesicles. Original label: Layered? gabbro. California 2 Camp Elliott
GRD02PZS0 Basalt Small green sample of a fine-grained dike rock.Plagioclase and Olivine phenocrysts with groundmass containing Epidote(?). Original label Point Sal dike chill margin (on card). California 2 Ritter 154, 29 F
GRD02RAS0 Ankaramite From University aix-marselle III, Faculte de Sciences et techniques de Saint-Jerome-Laboratorie de Petrologie Alabama 0 Ritter 154, 16 J
GRD02RJS0 Basalt Dark aphanitic massive vessicular, Plagioclase, Olivine. 4 Ritter 154, 3 F
GRD02RKS0 Basalt Massive Amygdaloidal Aphanitic rock containing secondary Calcite. 4 Ritter 154, 3 F
GRD02RMS0 Ankaramite Ankaramite with olivine(1-5 mm), cpx(1-8 mm), and plag, black groundmass Sao Miguel, Azores 4 Ritter 154, 3 F
GRD02RPS0 Basalt Pyroxene and Feldspar bearing Basalt. Vesicles remnant from approx 2-3 mm gas bubbles Washington 3 Ritter 154, 3 E
GRD02RQS0 Basalt Two billets. Visible feldspars. 2 Ritter 154, 3 E
GRD02RRS0 Basalt Xenolith in basalt. Two thin sections-1801-2, 1801-5. Hawaii 2 Ritter 154, 3 E
GRD02RTS0 Mafic Extrusive Plagioclase and pyroxene bearing Oregon 3 Ritter 154, 3 E
GRD02RWS0 Basalt Vesicular (~2-3 cm) Pahoehoe Basalt. One broken thin section Hawaii 1 Ritter 154, 3 E
GRD02S0S0 Picrite Olivine bearing basalt, large olivine phenocrysts (1-10 mm) Hawaii 0 Ritter 154, 3 E
GRD02TJS0 Basalt Plag-phyric. On PCT west of Butt Mountain, towards trail junction with spur to road. 9/99 California 1 Ritter 154, 29 D
GRD02TLS0 Basalt Sonora Pass SON 5. Large plag and pyroxene. California 1 Ritter 154, 29 C
GRD02TMS0 Basalt Sonora Pass lavas, SON 3 California 1 Ritter 154, 29 C
GRD02TTS0 Basalt On PCT west of Butt Mountain, towards trail junction with spur to road California 1 Ritter 154, 29 D
GRD02TUS0 Basalt Sonora Pass Lava, SON 4, 8/15/00 Possibly contains plagioclase and olivine phenocrysts California 1 Ritter 154, 29 C
GRD02TXS0 Basalt Small sample of basalt, highly altered. Original Description: Pillow basalts - good pillows California 1 Ritter 154, 16 H
GRD02U0S0 Basalt Logtown formation, pillow basalts California 1 Ritter 154, 16 G
GRD02VCS0 Basalt Basalt flow (Alkali?) California 0 Camp Elliott
GRD02W6S0 Basalt Nov-66 California 0 Camp Elliott