Sample Type is Metamorphic › Metamorphic Structures › Folds
21 records | DownloadIGSN | Sample Type | Notes | Location | Number Thin Sections | Storage Location |
---|---|---|---|---|---|
GRD01W9S0 | Folds | Very large sample of folded tremolite-talc (?)-carbonate schist. Well-foliated. | New York | 0 | Ritter 154, 14 R |
GRD01WZS0 | Folds | Large sample of folded chlorite-biotite-muscovite schist. Very well foliated, coarse-grained with nice crenulations. (Original label: M-146.) | 0 | Ritter 154, 14 P | |
GRD01WZS1 | Folds | Smaller sample of folded chlorite-biotite-muscovite schist. Very well foliated, coarse-grained with nice crenulations. (Original label: M-147.) | 0 | Ritter 154, 24 I | |
GRD01X1S0 | Folds | Well-developed foliation. Quartz-biotite-phologopite(?) gneiss. Small ptygmatic folds. | New Zealand | 1 | Ritter 154, 14 P |
GRD01X4S0 | Folds | Small quartz folds in fine-grained blue matrix. Blue: magnesioreibeckite (?), glaucophane (?). Original description: folded gneiss; blue schist facies? | 0 | Ritter 154, 14 P | |
GRD01X4S1 | Folds | Small quartz folds in fine-grained blue matrix. Blue: magnesioreibeckite (?), glaucophane (?). Original description: folded gneiss; blue schist facies? | 0 | Ritter 154, 14 P | |
GRD01Y1S0 | Folds | Medium-sized polished sample of gniess composed of biotite-quartz-garnet (minor). Ptygmatic folds of quartz. N30E 52 dip E20 plunge. | 0 | Ritter 154, 14 P | |
GRD01YES0 | Folds | Folded grey and white marble. Possibly relict folded bedding (?) from an impure limestone. Carbonate-biotite (black specks and layers). | California | 1 | Ritter 154, 14 P |
GRD01YHS0 | Folds | Fine-grained, finely banded marble with tight folds. Relict fossil (?) or porphyroblast. | Darwin Area | 0 | Ritter 154, 14 P |
GRD020YS0 | Folds | Quartz-mica-pyrite schist. Thin, well-formed, and bent banding. Cubic pyrite (rare). Very pronounced banding and hardness. Intense mylontization? | Switzerland | 0 | Ritter 154, 24 I |
GRD020ZS0 | Folds | Carbonate-biotite-quartz-amphibole-muscovite schist with folded laminae and ptygmatic folds. Melanocratic layers: biotite, carbonate, quartz. Leucocratic layers: carbonate, biotite, trace muscovite. Medium-grained quartz veins cutting across and along laminae. Marl protolith? Original description: Q-Bi gneiss with ptygmatic folds. | 1 | Ritter 154, 14 P | |
GRD029LS0 | Folds | Relict sandstone-limestone bedding that has been folded. The larger, grey beds are marble while the thinner beds are quartzite. One side of the sample is very weathered. Original label: folded intercalated sandstone-limestone. | 0 | Ritter 154, 24 I | |
GRD029VS0 | Folds | Banded, folded, and cut by quartz veinlets. Mainly cryptocrystalline materials (quartz, chlorite?) and relict soft-sediment structures. Banded hornfels? Original label: Serpentized gneiss. | NW Corner LB Quad | 0 | Ritter 154, 24 I |
GRD029YS0 | Folds | Very well-foliated (laminated), fine-grained schist. Quartz-riebeckite-amphibole-chlorite(?) schist. Nice differential slip microstructure. Original label: metasomatized serpentine schist. | 1 | Ritter 154, 24 I | |
GRD02BSS0 | Folds | Fine-grained muscovite schist. Slight folds and crenulations. Slickensides? | Alps | 0 | Ritter 154, 14 P |
GRD02BWS0 | Folds | S-folded gneiss. Phlogopite-biotite-quartz-pyrite (trace). Original description: folded phologopite gneiss. | 0 | Ritter 154, 14 P | |
GRD02BXS0 | Folds | Fine-grained gneiss with ptygmatic folds. Very nice example of folds. | 0 | Ritter 154, 14 P | |
GRD02EES0 | Folds | Folded carbonate. Some layers are visible, one of which contains a small amount of mica. | 0 | Ritter 154, 24 I | |
GRD02OAS0 | Folds | Two very large pieces of folded, bedded sample of marble and quartzite. The more granular beds are marble whereas the darker, more finely-grained beds are quartzite. Original description: Marble. | California | 2 | Ritter 154, 24 I |
GRD02OBS0 | Folds | No hand sample. Thin section only. Original description: Blastomylonite - fault zone material showing effects of extreme cataclasis and recrystallization. Note the layering showing different extents of granulation. | California | 1 | Ritter 154, 29 A |
GRD02UNS0 | Folds | Orocopia Schist. Greenschist layered black and green. Isoclinal folds(?). | California | 2 | Ritter 154, 14 P |