| GRD02OXS0 |
Non-layered Gneiss
|
Large sample of augen gneiss. Large augen of potassium feldspar. Potassium feldspar-quartz-biotite. Original label: S-C gneiss. |
California |
1 |
Ritter 154, 14 A |
| GRD02OYS0 |
Pegmatite
|
Small sample of a pegmatite. Unremarkable. Very small acicular crystals of tourmaline. Sample is not cut. Original label: Pegmatitic material. |
California |
0 |
Camp Elliott |
| GRD02OZS0 |
Syenite
|
Porphyritic syenite. Original label: K-rich porphyritic syenite? Syeno-gabbro. Parker Dam Granite. 1.40 Ga. GSA Field Trip. |
California |
0 |
Ritter 154, 15 D |
| GRD02OZS1 |
Syenite
|
Porphyritic syenite. Original label: K-rich porphyritic syenite? Syeno-gabbro. Parker Dam Granite. 1.40 Ga. GSA Field Trip. |
California |
0 |
Ritter 154, 15 D |
| GRD02P0S0 |
Mylonite
|
Very small sample and billets. Very fine-grained mylonite/gneiss. Original label: Mylonitic gneiss - from shear zone?. |
California |
2 |
Ritter 154, 24 I |
| GRD02P1S0 |
Schist
|
Very fine-grained schist cobble. Blue and green phyllosilicates. Five billets. Original label: Spotted schist. |
California |
2 |
Ritter 154, 24 D |
| GRD02P2S0 |
Schist
|
Fine-grained schist. Blue and green phyllosilicates with cordierite(?). Four billets. Original label: Mica schist. |
California |
2 |
Ritter 154, 14 C |
| GRD02P3S0 |
Monzonite
|
Two nice samples of quartz monzonite. Nice megacrysts of plagioclase. Plagioclase-quartz-hornblende. Three billets. Original label: Quartz monzonite. |
California |
2 |
Ritter 154, 15 E |
| GRD02P4S0 |
Non-layered Gneiss
|
Small sample of dark colored augen gneiss with plagioclase porphyroblasts. Billets. Original label: Calif 1085-1086 are concordant with this forming a screen of metamorphic rocks SE of Muir Pass. |
California |
2 |
Ritter 154, 14 A |
| GRD02P5S0 |
Relict Textures
|
Small samples of stretched pebble conglomerate. Original label: Meta-tuff? Calif 1084-1086 are concordant with this forming a screen of metamorphic rocks SE of Muir Pass. |
California |
2 |
Ritter 154, 14 O |
| GRD02P6S0 |
Mylonite
|
Small sample of grey mylonite. Original label: Mylonite. Calif 1084-1086 are concordant with this forming a screen of metamorphic rocks SE of Muir Pass. |
California |
2 |
Ritter 154, 24 I |
| GRD02P7S0 |
Monzonite
|
Two billets of quartz monzonite. Original label: Granodorite. Quartz Monzonite. From moraine but typical of granitic rock on Gaddard Divide. These intrude diorite and hornfels andesite on southwest towards Goddard. |
California |
2 |
Camp Elliott |
| GRD02P8S0 |
Monzonite
|
Small sample of fine-grained pink granite. Two billets. Original label: Granite or altered granodorite? From moraine but typical of granitic rock on Gaddard Divide. These intrude diorite and hornfels andesite on southwest towards Goddard. |
California |
2 |
Camp Elliott |
| GRD02P9S0 |
Scoria
|
Scoria with green and white xenoliths. Billets. Original label: Melted rock. Monterey Formation. 1988 Fall Field Trip. |
California |
2 |
Ritter 154, 15 J |
| GRD02PAS0 |
Obsidian
|
Red obsidian with scoriaceous pockets. Original label: Melted rock. Obsidian. Monterey Formation. 1988 Fall Field Trip. |
California |
2 |
Ritter 154, 15 M |
| GRD02PBS0 |
Chalk
|
Chalk with thin wispy lenses and layers of opal. Billets. Original label: Transition and opal CT. Monterey Formation. |
California |
2 |
Ritter 154, 18 L |
| GRD02PCS0 |
Gabbro
|
Coarse-grained gabbro. Billets. Original label: Ophiolite. Typical gabbro. |
California |
2 |
Ritter 154, 29 F |
| GRD02PDS0 |
Gabbro
|
Dark green fine-grained diorite (?) Billets. Original label: Ophiolite. Quartz diorite? Dike cutting Calif 1103. |
California |
2 |
Ritter 154, 29 F |
| 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 |
| GRD02PFS0 |
Ga-bearing Schist
|
Oricopia Schist. Garnet-bearing schist cobble. One lense of quartz runs through the middle of the sample. Billets. Original label: Mecca Hills clast. Fall Field trip 1988. |
California |
2 |
Ritter 154, 14 D |
| GRD02PGS0 |
Ga-bearing Schist
|
Quartz-Muscovite-Garnet-Cordierite Oricopia Schist. Garnet-bearing schist cobble. Patch of calcite on the exterior of the sample. Billets. Original label: Mecca Hills clast. Fall Field trip 1988. |
California |
2 |
Ritter 154, 14 C |
| GRD02PHS0 |
Quartzite
|
Two large samples of kyanite-bearing quartzite. |
California |
2 |
Ritter 154, 3 H |
| GRD02PIS0 |
Diorite
|
Diorite. Thin section only. No hand sample. Original label: Quartz diorite. |
California |
2 |
Ritter 154 |
| GRD02PJS0 |
Granite
|
Cut slab of porphyritic granite. Megacrysts of plagioclase. |
California |
4 |
Ritter 154, 15 B |
| GRD02PKS0 |
Anorthosite
|
Two samples of anorthosite. Large plagioclase feldspar with interstital green pyroxene. Large bleb of magnetite in larger sample. Original label: San Gabriels Field Trip. |
California |
2 |
Ritter 154, 16 F |
| GRD02PLS0 |
Anorthosite
|
Large plagioclase feldspar with trace interstital green pyroxene, pyrite, and magnetite. Original label: San Gabriels Field Trip. |
California |
2 |
Ritter 154, 16 F |
| GRD02PMS0 |
Anorthosite
|
Large plagioclase feldspar with trace interstital green pyroxene, pyrite, and magnetite. Original label: San Gabriels Field Trip. |
California |
2 |
Ritter 154, 16 F |
| GRD02PNS0 |
Anorthosite
|
Large plagioclase feldspar with interstital green pyroxene. White rims around the plagioclase. Original label: San Gabriels Field Trip. |
California |
2 |
Ritter 154, 16 F |
| GRD02POS0 |
Anorthosite
|
Large plagioclase feldspar with trace interstital green pyroxene. Original label: Syenite? |
California |
2 |
Ritter 154, 16 F |
| GRD02PPS0 |
Anorthosite
|
Large plagioclase feldspar with trace interstital green pyroxene and magnetite. Original label: Syenite? |
California |
2 |
Ritter 154, 16 F |
