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IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD00J2S0 Undersaturated greenish, altered, Plag, Amph-phryic; probably part of Older Basaltic Series (3-6 Ma) of basaltic, trachybasaltic, trachytic, and phonolitic flows Spain 0 Ritter 154, 16 O
GRD00J3S0 Undersaturated grey, altered, Plag, Amph-phryic cobble; probably part of Older Basaltic Series (3-6 Ma) of basaltic, trachybasaltic, trachytic, and phonolitic flows Spain 0 Ritter 154, 16 O
GRD00J4S0 Foid-Bearing Extrusive tephrite with xenolith; 1949 eruption along Cumbre Vieja ridge; magmas fractionated CPX + Ol kaersutite Titanomagnetite Spain 0 Ritter 154, 16 O
GRD00J5S0 Foid-Bearing Extrusive tephrite with xenolith; 1949 eruption along Cumbre Vieja ridge; magmas fractionated CPX + Ol kaersutite, Titanomagnetite Spain 0 Ritter 154, 16 O
GRD00J6S0 Igneous Structures peridotite xenolith Spain 0
GRD00J7S0 Granite porphyritic granite (Kspar phenos, Plag, Q, Hb, Bi, sphene) 0 Ritter 154, 19 B
GRD00J8S0 Granite medium grained, fresh granite (Plag, Kspar (pale pink), Q, Bi, Hb) 0 Ritter 154, 15 B
GRD00J9S0 Aa vesicular, glassy, aphryic basalt; 1981 flow Hawaii 0 Ritter 154, 16 I
GRD00JAS0 Bombs spatter and bombs; alkali-olivine basalt or basanite California 0 Ritter 154, 16 I
GRD00JAS1 Bombs Large bomb; alkali-olivine basalt or basanite California 0 Ritter 154, 16 I
GRD00JBS0 Ignimbrite White unwelded Bishop Tuff with brown pumice fragments. Top of section at middle hydro plant California 0 Ritter 154, 15 K
GRD00JCS0 Welded Ignimbrite Pink groundmass with purple pumice, moderately welded Bishop Tuff. 40m below top of section at middle hydro plant California 0 Ritter 154, 15 L
GRD00JCS1 Welded Ignimbrite Pink groundmass with purple pumice, moderately welded Bishop Tuff. 40m below top of section at middle hydro plant California 0 Ritter 154, 19 J
GRD00JDS0 Welded Ignimbrite Pink with grey fiamme, densely welded Bishop Tuff. 100 m below top of section at middle hydro plant. California 0 Ritter 154, 15 L
GRD00JDS1 Welded Ignimbrite Pink with grey fiamme, densely welded Bishop Tuff. 100 m below top of section at middle hydro plant. California 0 Ritter 154, 19 J
GRD00JDS2 Welded Ignimbrite Pink with grey fiamme, densely welded Bishop Tuff. 100 m below top of section at middle hydro plant. California 0 Ritter 154, 19 J
GRD00JES0 Welded Ignimbrite Purple, densely welded Bishop Tuff. 150m below top of section at middle hydro plant California 0 Ritter 154, 15 L
GRD00JFS0 Welded Ignimbrite Grey, densely welded Bishop Tuff. Base of tuff. Note remelting of flattened pumice. California 0 Ritter 154, 19 J
GRD00JGS0 Sheet Flow 8 cm thick curved sheet flow. Glass on both margins Pacific Ocean 0 Ritter 154, 16 I
GRD00JHS0 Basalt Glassy, aphyric basalt. Cut sample but likely part of sheet flow. Pacific Ocean 0 Ritter 154, 16 H
GRD00JIS0 Andesite altered, Plag-phyric andesite Cascades 0 Ritter 154, 16 B
GRD00JJS0 Gabbro biotite-bearing gabbro California 0 Ritter 154, 16 R
GRD00JKS0 Pahoehoe vesicular, glassy, aphryic basalt; 1988 flow Hawaii 0 Ritter 154, 16 I
GRD00JKS1 Pahoehoe vesicular, glassy, aphryic basalt; 1988 flow Hawaii 0 Ritter 154, 16 I
GRD00JLS0 Pegmatite Tourmaline (schorl) in pegmatite. Stored on shelf in main room of RH 154, north side of room. California 0 Ritter 154
GRD00JMS0 Granite pink granite (Kspar, Q) California 0 Ritter 154
GRD00JNS0 Basalt Glassy, aphyric basalt. Cut sample but likely part of sheet flow. Pacific Ocean 1 Ritter 154, 16 H
GRD00JNS1 Granite Large (2 cm) pink orthoclase crystals, quartz, biotite. 0 Ritter 154, 15 B
GRD00JOS0 Ignimbrite Large pumice within tuff, 100 feet below top. Missing sample California 1 Ritter 154, 15 K
GRD00JSS0 Diatomite diatomite Monterey Fm., Miocene California 1 Ritter 154, 18 M