Unit symbol: | Pzarqm |
---|---|
Age range | Devonian or older (541 to 358.9 Ma) |
Lithology: | Metamorphic |
Group name: | Schist and phyllite of the Alaska Range |
Source map | Reed, B.L., and Nelson, S.W., 1980, Geologic map of the Talkeetna quadrangle, Alaska: U.S. Geological Survey, Miscellaneous Investigation Series Map I-1174, 15 pages, 1 plate, scale 1:250,000. |
---|---|
Symbol | Pzsv |
Unit name | Quartzite, semischist, and metavolcanic rocks |
Description | Tan to light-greenish-gray, low-grade (greenschist facies), regionally metamorphosed quartzite, quartz semischist, quartz grit, metavolcanic rocks, and minor conglomerate, limestone, phyllite, and quartz-muscovite schist. Isoclinally folded. |
Lithology | Metamorphic |
Label | PzZaqs |
---|---|
Description | Pelitic and quartzose schist of the Alaska Range |
Geologic age | Paleozoic to Devonian |
Geologic setting | Sedimentary, undivided |
Lithology | Form | Importance |
---|---|---|
Pelitic-schist < Metaclastic < Metasedimentary < Metamorphic | Greenschist | Major |
Quartzite < Metaclastic < Metasedimentary < Metamorphic | Greenschist | Major |
Phyllite < Metaclastic < Metasedimentary < Metamorphic | Greenschist | Minor |