Sample Type is Metamorphic › Metamorphic Structures › Relict Textures
28 records | Download| IGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
|---|---|---|---|---|---|
| GRD01YUS0 | Relict Textures | Well-foliated. Stretched quartzite pebbles (~3 in length). Chlorite-biotite-muscovite schist between pebbles. | California | 0 | Ritter 154, 14 O |
| GRD021AS0 | Relict Textures | Large sample is well-banded (quartz and fine-grained slate) and dense. Cryptocrystalline materials with soft-sediment type structures. Highly recrystallized (?). | 0 | Ritter 154, 24 M | |
| GRD029KS0 | Relict Textures | Stretch pebble conglomerate. Stretched white quartzite pebbles in a biotite-muscovite-quartz schist matrix. | California | 0 | Ritter 154, 14 O |
| GRD029MS0 | Relict Textures | Deformed/flattened quartzite pebbles in a gneissic matrix. Quartz-potassium feldspar- biotite-muscovite (trace)- amphibole (trace). Biotite mantles the quartzite pebbles. Original label: porphyroblastic gneiss. | Arizona | 0 | Ritter 154, 14 O |
| GRD029NS0 | Relict Textures | Large sample of angular polymictic clasts in a matrix composed of quartz-feldspars-pyrite (trace). | 0 | Ritter 154, 17 B | |
| GRD029OS0 | Relict Textures | Large cut sample with relict bedding structures. Beds are wavy. Abundant quartzite. Dolomite is not evident. Original label: Diopside-dolomite marble. | 0 | Ritter 154, 14 O | |
| GRD029PS0 | Relict Textures | Three small samples of metaconglomerate. Stretched granite/diorite pebbles in schist matrix. Schist is composed of biotite-muscovite-quartz-pyrite Original label: Biotite-muscovite-quartz. Mica Schist Conglomerate. | 0 | Ritter 154, 24 H | |
| GRD029QS0 | Relict Textures | Discontinuous relict laminations and cross-bedding in fine-grained quartzite. Original label: Zebra rock. | Arizona | 0 | Ritter 154, 14 O |
| GRD029RS0 | Relict Textures | Amphibolite with quartz vein and pyrite-rich layers. Sample is capped by chlorite-biotite schist. Original label: Metagreywake. | Wyoming | 1 | Ritter 154, 14 O |
| GRD029SS0 | Relict Textures | Black, fine-grained sample with sheared clasts. Low-grade metamorphism. Original label: Tillite (Metatillite). Coll. No. 69A. | Vermont | 0 | Ritter 154, 24 H |
| GRD029TS0 | Relict Textures | Alternating dark green shale and grey fine-grained quartzite layers. Low-grade metamorphism. Original label: Low-grade chert or black shale? | 0 | Ritter 154, 14 O | |
| GRD029US0 | Relict Textures | Fine-grained quartz-biotite-potassium feldspar. A large potassium feldspar crystal. Relict grains. Original label: Metagreywacke. Quartz-biotite. | NW Corner LB Quad | 0 | Ritter 154, 24 H |
| GRD029XS0 | Relict Textures | Metagreywacke. Fine-grained quartz-biotite-plagioclase. Cryptocrystalline. A few stringers of quartz and plagioclase. Original label: Metagreywacke (Q-Bi-Pl). | 0 | Ritter 154, 24 I | |
| GRD02A0S0 | Relict Textures | Metamorphosed welded tuff. Slightly foliated with relict clasts. Fine-grained. Quartz-feldspars-pyrite (trace)-biotite (trace). | California | 0 | Ritter 154, 24 H |
| GRD02A1S0 | Relict Textures | Metavolcanic. Small white rounded clasts could be relict phenocrysts. Dark grey angular clasts are quartz. Original description: Metamorphosed quartz porphyry. Lower Cretaceous | California | 1 | Ritter 154, 14 O |
| GRD02A2S0 | Relict Textures | Large sample of stretched pebble conglomerate. Stretched and flattened pink quartzite pebbles in schistose matrix. Biotite-muscovite-anthophyllite-garnet schist matrix. Probably Grenville. Original description: Metaconglomerate. Qtz-Bio-Musc-Anthophyllite-Garnet. Most likely granulite facies. | Canada | 0 | Ritter 154, 14 R |
| GRD02A3S0 | Relict Textures | Large sample of metaconglomerate. Polymictitic clasts. Rounded and subrounded clasts of quartzite, slate, and syenite. The clasts range in size from ~1 to 5 cm. Green phyllite matrix. Some weathering on one side of the sample. See also M-331. Original description: Metaconglomerate. | 0 | Ritter 154, 14 R | |
| GRD02A4S0 | Relict Textures | Small sample of metaconglomerate. Polymictitic clasts. One large rounded clasts of quartzite with small green clasts of slate and quartzite. Green phyllite matrix. Some weathering on sample. See also M-332. Original description: Metaconglomerate. Weathered. Qtz- chlorite- Fe-oxides. | 0 | Ritter 154, 24 H | |
| GRD02A6S0 | Relict Textures | Small sample of green phyllite. Some small quartz and Fe-oxide minerals. Looks just like the matrix of M-331 and M-332. Some weathering on sample. Original description: Metaconglomerate. Weathered. Qtz-chlorite- Fe-oxides. | 0 | Ritter 154, 24 H | |
| GRD02A7S0 | Relict Textures | Cryptocrystalline to medium-grained. Bands of quartz (some cherty), feldspar, and phlogopite. Relict bedding planes? | 0 | Ritter 154, 24 H | |
| GRD02AAS0 | Relict Textures | Large sample that grades from biotite-phologopite to tremolite to tremolite-talc layers. All layers are very coarse-grained. Grenville age? Original label: Phlogopite-biotite-talc-tremolite rock. | New York | 0 | Ritter 154, 14 R |
| GRD02ABS0 | Relict Textures | Small glaucophane- magnesioreibeckite-quartz-muscovite (trace) schist. Fine- to medium-grained. Original label: Blueschist. | Mexico | 1 | Ritter 154, 24 H |
| GRD02ACS0 | Relict Textures | Very fine-grained. Banding/relict bedding. Cryptocrystalline pink and teal mafic beds with dark grey beds. | 1 | Ritter 154, 14 O | |
| GRD02AES0 | Relict Textures | Orange (Fe-stained) quartzite with magnetite lenses and tarvertine-filled vugs. Brecciated base? Original label: Breccia with calcium-carbonate (travertine) filling. | California | 0 | Ritter 154, 24 H |
| GRD02APS0 | Relict Textures | Metavolcanic. Chlorite-quartz-hematite-pyrite (trace). Slightly foliated. Medium-grained quartz porphyroblasts and fine-grained quartz stringers. | 0 | Ritter 154, 24 H | |
| GRD02C3S0 | Relict Textures | Rounded schist and smaller angular black flecks in a very fine-grained greenish/black silicic matrix. Original label: pseudo-tachylite. | Switzerland | 0 | Ritter 154, 24 H |
| GRD02F2S0 | Relict Textures | Non-foliated rock with concentric structure. Medium-grained plagioclase-quartz-chlorite-biotite (trace). | California | 0 | Ritter 154, 24 H |
| 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 |