Metamorphic Rocks To Know And Describe Flashcards Preview

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Flashcards in Metamorphic Rocks To Know And Describe Deck (12):
1

-foliated
-fine grained, glossy sheen, breaks along wavy surfaces
-parent rock: Shake, mudstone, or siltstone

Phyllite

2

-foliated
-medium to coarse grained, scaly foliation, Micas dominate
-parent rock: Shale, mudstone, or siltstone

Schist

3

-foliated
-metamorphism reaches a temperature (>700 degrees) where rocks begin to melt
- Felsic minerals melt while magic remains solid
-silica rich liquid invade rock as veins and stringers
-banded rock with zones of liquid colored crystalline minerals
-parent rock: shale, granite, or volcanic rocks

Migamite

4

-non foliated
-medium to coarse grained, relatively soft, interlocking calcite or dolomite grains
-parent rock: limestone, dolomite

Marble

5

-weakly or non foliated
- medium grade metamorphism of magic igneous rocks
-long thin crystals aligned in a common direction (lineation)

Amphibolite

6

-Weakly or non foliated
- high to very high grade metamorphism of magic igneous rocks
-display granular texture consisting of Quartz, plagioclase, pyroxene, garnet, Al-silicates

Granulite

7

-weakly foliated
-coarse-grained
-stretch pebbles with proffered orientation
-parent rock: Quartz-rich conglomerate

Metaconglomerate

8

-non foliated
- medium to coarse grained, very hard, massive, fused Quartz grains
-parent rock: Quartz. Sandstone

Quartzite

9

-non foliated
-very fine grained, often exceedingly tough and durable, usually dark colored
-parent rock: often shale, but can have any composition

Hornfel

10

-non foliated
- fine grained, usually dark massive rock with dull luster
-parent rock: any rock type

Anthracite

11

-Non foliated
-medium to very coarse grained, broken fragments in a haphazard arrangement
-parent rock: any rock type

Fault breccia

12

-foliated
-composed of tiny chlorite and mica flakes, breaks in flat slabs called slaty cleavage, smooth dull surfaces
-parent rock: Shake, mudstone, or siltstone

Slate