| GRD02QMS0 |
Rhyolite
|
Flow banded rhyolite |
California |
0 |
Ritter 154, 15 L |
| 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 |
| GRD02QPS0 |
Granite
|
|
California |
4 |
Ritter 154, 15 B |
| 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 |
| GRD02QSS0 |
Dacite
|
Likely from avalanche deposit. Has biotite and amphibole. |
|
0 |
Ritter 154, 15 Q |
| GRD02QTS0 |
Diorite
|
|
California |
2 |
Ritter 154, 15 P |
| GRD02QUS0 |
Dacite
|
Very fresh phenocrysts. Plag-euhedral, Quartz is rounded. |
California |
1 |
Ritter 154, 15 Q |
| GRD02QVS0 |
Andesite
|
Plag-hornblend phyric andesite |
California |
1 |
Ritter 154, 16 B |
| GRD02QWS0 |
Andesite
|
Plag porphorite Andesites |
5 Lakes Trail at road to Alpine Meadows ski area Rte 89 |
1 |
Ritter 154, 16 B |
| 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 |
| GRD02QZS0 |
Dacite
|
|
California |
1 |
Ritter 154, 29 D |
| GRD02R0S0 |
Mafic Intrusive
|
Gabbro Norite with shear zone showing cataclasis. Original Description: Layered Gabbro/Troctolite. |
California |
2 |
Ritter 154, 16 D |
| GRD02R1S0 |
Mafic Intrusive
|
Wehrlite, may contain enough Opx to be considered Lherzolite. Original Description: Mela-Norite Dike cutting Calif 1237 and Calif 1238 |
California |
2 |
Ritter 154, 16 D |
| GRD02R2S0 |
Anorthosite
|
Medium grained plagioclase, amphibole rich. |
California |
0 |
Ritter 154, 16 C |
| GRD02R3S0 |
Gabbro
|
Hb gabbro; part of meter scale dike with very large amphibole crystals perpendicular to the margin. 3-6 cm Hb crystals with altered plagioclase. Slightly fractured. |
California |
0 |
Ritter 154, 16 C |
| GRD02R4S0 |
Gabbro
|
|
California |
0 |
Ritter 154, 20 B |
| GRD02R5S0 |
Gabbro
|
Amphibole plag banding, medium grained. Plag and hornblend approximately one cm in size. Moderate weathering. Opx, possibly some olivine |
California |
0 |
Ritter 154, 16 D |
| GRD02R6S0 |
Obsidian
|
Spherulitic devitrification of obsidian. Large radiating spherulites |
|
0 |
Ritter 154, 15 M |
| GRD02R7S0 |
Granodiorite
|
10 Kspar, 40 plag, 5 amphibole, 40 quartz, 5 biotite + sphene |
|
0 |
Ritter 154, 15 N |
| GRD02R8S0 |
Aa
|
Olivine bearing basalt. aa flow. Vesicular. |
Hawaii |
0 |
Ritter 154, 16 H |
| GRD02R9S0 |
Pahoehoe
|
Two large pieces. Smooth interior, indicative of a lava tube or a cast |
|
0 |
Ritter 154, 16 I |
| 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 |
| GRD02RLS0 |
Granite
|
Cummulate Tourmaline(Schorlite) bearing pegmatite. Off-white subhedral Plagioclase(1-2 cm) forming cumulate band in rock. Gray vitreous anhedral Quartz(0.5-2 cm). Light pink/yellow subhedral K-spar (1-5 mm). Black sub/euhedral Schorlite (1 mm - 1 cm) forming cummulate band adjacent to Plagioclase band. |
|
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 |
| GRD02RNS0 |
Komatiite
|
Komatiite showing diagnostic spinifex texture. Olivine, Cpx, Serpentine, Magnetite. |
|
5 |
Ritter 154, 3 F |
