10/23/17 - Metamorphic Rocks

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Notes

Quiz on Thursday on Metamorphic rock.

Minerals in Metamorphic rock change shape due to heat and pressure.

Know Pelitic and Quartzo-feldspathic, Basic, Calcareous

Shale turns into Slate, Vermont has a lot of Slate

Know Phylitte, Schist, Talc Schist, etc

Gneiss, these are in Wyoming

Migmatite, in Wisconsin

Hornfels

Metabasalt - grows minerals called Chlorite, turns green

Mica will crystalize into .... Goes backward in the bowman series

50 to 60 Kilometers in depth is when the minerals start to change.

Bluesist - created at high pressure and low temperatures

Limestone turns into marble

Classify by texture and composition

Non foliated quartz and marble

New York has chlorite grade, map on last slide

Know PTT path

Know scientist Ahiko Miyashiro from last slide

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Geologic Time

James Ussher estimated the Earth started Oct. 23, 4004 BC

Nicolaus Steno

James Hutton

William Smith - made very first geologic map ever

Ernest Rutherford - we know how old rocks are thanks to him