Metamorphic Rocks To Know And Describe Flashcards
1
Q
- foliated
- fine grained, glossy sheen, breaks along wavy surfaces
- parent rock: Shake, mudstone, or siltstone
A
Phyllite
2
Q
- foliated
- medium to coarse grained, scaly foliation, Micas dominate
- parent rock: Shale, mudstone, or siltstone
A
Schist
3
Q
- 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
A
Migamite
4
Q
- non foliated
- medium to coarse grained, relatively soft, interlocking calcite or dolomite grains
- parent rock: limestone, dolomite
A
Marble
5
Q
- weakly or non foliated
- medium grade metamorphism of magic igneous rocks
- long thin crystals aligned in a common direction (lineation)
A
Amphibolite
6
Q
- 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
A
Granulite
7
Q
- weakly foliated
- coarse-grained
- stretch pebbles with proffered orientation
- parent rock: Quartz-rich conglomerate
A
Metaconglomerate
8
Q
- non foliated
- medium to coarse grained, very hard, massive, fused Quartz grains
- parent rock: Quartz. Sandstone
A
Quartzite
9
Q
- non foliated
- very fine grained, often exceedingly tough and durable, usually dark colored
- parent rock: often shale, but can have any composition
A
Hornfel
10
Q
- non foliated
- fine grained, usually dark massive rock with dull luster
- parent rock: any rock type
A
Anthracite
11
Q
- Non foliated
- medium to very coarse grained, broken fragments in a haphazard arrangement
- parent rock: any rock type
A
Fault breccia
12
Q
- foliated
- composed of tiny chlorite and mica flakes, breaks in flat slabs called slaty cleavage, smooth dull surfaces
- parent rock: Shake, mudstone, or siltstone
A
Slate
