Sample Type is Metamorphic › Foliated › Gneiss › Non-layered Gneiss
44 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD01GBS0 | Non-layered Gneiss | Original description: Specimen from gneissic rocks at Lizard Point, Late Paleozoic. | United Kingdom | 0 | Camp Elliott |
| GRD01UPS0 | Non-layered Gneiss | Quartzofeldspathic-muscovite-biotite. Moderately gneissic. Recrystallized vein composed of quartz and pink potassium feldspar. | 1 | Ritter 154, 14 A | |
| GRD01UQ | Non-layered Gneiss | Amphibole-potassium feldspar gneiss. Original description: "Quartz-hornblende syenite gneiss". | Ontario | 0 | Ritter 154, 14 A |
| GRD01UQS0 | Non-layered Gneiss | Amphibole-potassium feldspar gneiss. Original description: Quartz-hornblende syenite gneiss. | Ontario | 0 | Camp Elliott |
| GRD01URS0 | Non-layered Gneiss | Quartzofeldspathic gneiss. Plagioclase-quartz-garnet-biotite. Garnet porphyroblasts and thin wispy biotite bands. Original description: Granitized greywacke | New York | 0 | Ritter 154, 14 A |
| GRD01US | Non-layered Gneiss | Plagioclase-biotite-quartz-pyroxene gneiss. Grading to schist. Moderately altered. Original description: "granodiorite". | California | 0 | Ritter 154, 14 A |
| GRD01USS0 | Non-layered Gneiss | Plagioclase-biotite-quartz-pyroxene gneiss. Grading to schist. Moderately altered. Original description: granodiorite. | California | 1 | Ritter 154, 24 B |
| GRD01UV | Non-layered Gneiss | Potassium-feldspar-quartz-amphibole-biotite. Discontinuous banding and coarse-grained (K-spar ~1 x 3 cm). | 0 | Ritter 154, 14 A | |
| GRD01UVS0 | Non-layered Gneiss | Potassium-feldspar-quartz-amphibole-biotite. Discontinuous banding and coarse-grained (K-spar ~1 x 3 cm). | 0 | Ritter 154, 14 A | |
| GRD01UWS0 | Non-layered Gneiss | Primary large pink potassium feldspar with interstital quartz, amphibole, and biotite. Medium- to fine-grained. Recrystallized. | 0 | Ritter 154, 24 A | |
| GRD01V4S0 | Non-layered Gneiss | Garnet gneiss with poorly developed foliation. Quartz-plagioclase-garnet-biotite. Original label: Sillimanite-garnet gneiss. | New York | 0 | Ritter 154, 14 A |
| GRD01VBS0 | Non-layered Gneiss | Large sample with thin, discontinuous bands. Fine-grained quartz-plagioclase-biotite. | 0 | Ritter 154, 24 B | |
| GRD01VCS0 | Non-layered Gneiss | Six small samples. Potassium feldspar-quartz-amphibole-biotite. Discontinuous banding. | 0 | Ritter 154, 24 A | |
| GRD01VIS0 | Non-layered Gneiss | Small sample of gneiss composed of biotite-garnet-quartz-potassium feldspar. Poorly developed banding. | 0 | Ritter 154, 24 B | |
| GRD01W4S0 | Non-layered Gneiss | Black biotite with some continuous and discontinuous banding. Large sample. | California | 0 | Ritter 154, 14 I |
| GRD01W4S1 | Non-layered Gneiss | Black biotite with some continuous and discontinuous banding. Small sample. | California | 0 | Ritter 154, 24 B |
| GRD01XDS0 | Non-layered Gneiss | Foliated with discontinuous banding. Green amphibole. A single very large augen/boudin compsed of pink quartz with flecks of amphibole and actinolite. Original description: metamorphosed conglomerate. | Canada | 1 | Ritter 154, 14 B |
| GRD01Y2S0 | Non-layered Gneiss | Medium-sized sample of gneiss composed of quartz-potassium feldspar-biotite-garnet (trace). Poorly developed lineations. Original description: Granulite facies (?), Qtz- K-spar- Garnet- Biotite. | New York | 0 | Ritter 154, 24 A |
| GRD01ZUS0 | Non-layered Gneiss | Medium-sized sample of a gneiss composed of quartz-muscovite-plagioclase-pyrite (trace). Little to no banding present. | 1 | Ritter 154, 24 B | |
| GRD0201S0 | Non-layered Gneiss | Slightly foliated and banded; Leucocratic layer is composed of potassium feldspar-quartz-amphibole. Melanocratic layer is composed of phologopite-biotite-amphibole. | 0 | Ritter 154, 24 A | |
| GRD0203S0 | Non-layered Gneiss | Quartz-plagioclase-pyrite gneiss. Weakly to moderately foliated (discontinuous banding). Coarse- to very coarse-grained. From near an ore deposit (?). Not a nice example of a gneiss. | 0 | Ritter 154, 24 B | |
| GRD0206S0 | Non-layered Gneiss | Large sample of a well-foliated, medium- to coarse-grained gneiss. The sample contains a large band of scapolite, biotite, quartz, potassium feldspar, and pyroxene. The band is between biotite-rich layers with less scapolite. Possibly part of a migmatite. | Canada | 1 | Ritter 154, 14 A |
| GRD020CS0 | Non-layered Gneiss | Potassium feldspar-quartz-magnetite. Large feldspar augen (some with laboradorescence) and thin wispy layers of magnetite. Mica-poor gneiss (?) | 1 | Ritter 154, 24 B | |
| GRD020US0 | Non-layered Gneiss | Medium-sized slab of fine-grained gneiss composed of quartz-biotite-garnet. Some relict grains. No banding. Original description: metagreywacke; waltons QBG; Qtz-biotite-garnet. | 0 | Camp Elliott | |
| GRD0218S0 | Non-layered Gneiss | Small sample of coarse-grained gneiss composed of potassium feldspar-quartz-muscovite. Discontinuous/lumpy banding (former augens?). | Alpine | 1 | Ritter 154, 24 A |
| GRD02A5S0 | Non-layered Gneiss | Large sample of muscovite-quartz-chloritoid (?) gneiss. Discontinuous quartz bands. Medium- to coarse-grained. Original description: Mu-Q gneiss. Chlorite zone. | New Zealand | 0 | Ritter 154, 14 R |
| GRD02BRS0 | Non-layered Gneiss | Quartz-muscovite-biotite gniess. Poorly developed lineations of biotite. | Alpine | 2 | Ritter 154, 24 A |
| GRD02EKS0 | Non-layered Gneiss | Feldspar-quartz-biotite-amphibole (?) gneiss. Poorly developed banding; thin wisps of biotite. | 0 | Ritter 154, 24 A | |
| GRD02ELS0 | Non-layered Gneiss | Quartz-biotite-garnet gneiss. Poorly developed banding; thin wisps of biotite. | 0 | Ritter 154, 24 A | |
| GRD02EXS0 | Non-layered Gneiss | Potassium feldspar-amphibole-biotite (?) gneiss. Poorly developed banding. See also M-157. | 0 | Ritter 154, 24 B |