Sample Type is Metamorphic › Foliated › Gneiss › Layered Gneiss
31 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD01UXS0 | Layered Gneiss | Quartz-amphibole-garnet-plagioclase. Medium-grained (max grain size: 2-3 mm). One large porphyroblast. Original description: Serpentinized gneiss. | 0 | Ritter 154, 24 A | |
| GRD01UYS0 | Layered Gneiss | Amphibole (hornblende)-quartz-plagioclase-garnet (rare). Nice mineral segregation between leucocratic (quartz) and melanocratic (hornblende) layers. | 0 | Ritter 154, 14 A | |
| GRD01UZS0 | Layered Gneiss | Amphibole-plagioclase-garnet-biotite-epidote gneiss. Bands of epidote-garnet and amphibole. Epidote only in leucocratic bands. | 0 | Ritter 154, 24 B | |
| GRD01V1S0 | Layered Gneiss | Gneiss composed of quartz-feldspar-amphibole (good crystal structure)-garnet. Medium to coarse-grained (max crystal size ~7 mm). Some banding is visible. | 5 | Ritter 154, 3 H | |
| GRD01V3S0 | Layered Gneiss | Medium-sized sample of gneiss composed of amphibole-plagioclase-potassium feldspar-quartz-biotite. Lineations are present. Bands of potassium feldspar and quartz within thick melanosomes of amphibole-plagioclase-minor biotite. | 0 | Ritter 154, 24 A | |
| GRD01V6S0 | Layered Gneiss | Well-banded gneiss composed of biotite-quartz-plagioclase (trace). | California | 0 | Ritter 154, 24 B |
| GRD01V7S0 | Layered Gneiss | Multiple small samples of gneiss composed of potassium feldspar-quartz-biotite-plagioclase (trace). Granulite facies (?). Elongated Kspar, quartz, and biotite (lineations); augen texture perpendicular to elongation. | 0 | Camp Elliott | |
| GRD01V8S0 | Layered Gneiss | Large sample with thin, continuous bands. Biotite-amphibole (?)- plagioclase- quartz-potassium feldspar- Fe-oxide (trace). Small stringers of quartz-Kspar. | 0 | Ritter 154, 14 I | |
| GRD01V9S0 | Layered Gneiss | Large sample of gneiss composed of hornblende/amphibole-quartz-potassium feldspar-plagioclase (trace)-biotite (trace). Nice lineations in one plane with nice foliation in another; fine biotite (?) veinlets perpendicular to lineation and foliation. | 0 | Ritter 154, 14 B | |
| GRD01XES0 | Layered Gneiss | Biotite/amphibole-quartz-plagioclase (minor)-pyrite (rare). Layer of amphibole/actinolite(?). Large augen/boudin compsed of clear quartz. Original description: metamorphosed conglomerate. | Canada | 1 | Ritter 154, 14 B |
| GRD01ZQS0 | Layered Gneiss | Potassium feldspar-quartz-garnet-amphibole (?). Coarse to very coarse-grained. Not the nicest example of a gneiss. | California | 0 | Camp Elliott |
| GRD0207S0 | Layered Gneiss | Small sample of a gneiss composed of quartz-plagioclase-biotite-magnetite-garnet. The sample has continuous banding, quartz and garnet porphyroblasts, and is fine- to medium-grained. | 0 | Ritter 154, 24 A | |
| GRD020LS0 | Layered Gneiss | Fine-grained (cryptocrystalline) gneiss with folds and augen. Quartz-pyroxene-pyrite (rare). Foliated with continuous thin bands- relict bedding/laminations (?). | 1 | Ritter 154, 14 B | |
| GRD021CS0 | Layered Gneiss | Slab of a gneiss with thin continuous bands. Phologopite- quartz-plagioclase (?). | 0 | Ritter 154, 14 A | |
| GRD021ES0 | Layered Gneiss | Plagioclase-quartz-amphibole-biotite-garnet-pyrite (trace). Gradation from schist to gneiss. Gneiss has a slight augen texture. Pyrite and garnets are in leucocratic bands. See also M-111. | California | 0 | Ritter 154, 24 B |
| GRD021GS0 | Layered Gneiss | Medium-sized sample of fine to medium-grained gneiss composed of biotite-quartz-plagioclase. Thick bands of biotite and amphibole with thin continuous and discontinuous bands of quartz and plagioclase (minor). Some green mineral (vesuvianite?) in the leucocratic layers. | California | 0 | Camp Elliott |
| GRD029ZS0 | Layered Gneiss | Coarse-grained potassium feldspar-quartz-biotite gneiss. Thin continuous and discontinuous bands. | 0 | Ritter 154, 24 A | |
| GRD02BZS0 | Layered Gneiss | Phlogopite-biotite (?)-quartz gneiss. Thin bands of phyllosilicates and quartz. | 0 | Ritter 154, 24 A | |
| GRD02N4S0 | Layered Gneiss | Mylonitic gneiss with delta clasts. Lineations on bottom of the sample. Original description: Flaser gneiss interlayered with metasediments. | California | 3 | Ritter 154, 3 G |
| GRD02RDS0 | Layered Gneiss | Banded Gneiss, Amphibolite Facies Quartzo-Feldspathic Protolith | 5 | Ritter 154, 3 H | |
| GRD02RIS0 | Layered Gneiss | Feldspar-Quartz-Biotite Large feldspars approximately 1-2cm. | 9 | Ritter 154, 3 G | |
| GRD02U2S0 | Layered Gneiss | Probably amphibolite facies. Contact zone in lwr-mid Jurassic Sailor Creek/Tuttle Lake | California | 1 | Ritter 154, 24 B |
| GRD02UFS0 | Layered Gneiss | Para-gneiss - greywacke protolith(?). Inspiration Point is Pinto Gneiss Migmatite, this may overly it. | California | 1 | Ritter 154, 14 A |
| GRD02V6S0 | Layered Gneiss | QF schist-gneiss | California | 0 | Camp Elliott |
| GRD02V8S0 | Layered Gneiss | Calc-silicate gneiss. | California | 0 | Camp Elliott |
| GRD02VBS1 | Layered Gneiss | Flaser Gneiss. Interlayered with marble and amphibolite gneiss. | California | 0 | Camp Elliott |
| GRD02VHS0 | Layered Gneiss | Qf gneiss, interlayered with metaseds. | California | 0 | Camp Elliott |
| GRD02X0S0 | Layered Gneiss | Banded Gneiss. Biotite - Quartz - Plag | California | 4 | Ritter 154, 14 A |
| GRD02X1S0 | Layered Gneiss | Unknown location of origin and age. | California | 0 | Ritter 154, 24 B |
| GRD02XMS0 | Layered Gneiss | Quartz-Amphibole and Calcite-Epidote(?) bands(~1cm thick) interlayered. Unable to find further location details through web searches. | La Costa Verde Quarry | 0 | Ritter 154, 14 B |