easy
The process of forming metamorphic rocks
Metamorphism
The two main agents of metamorphism
Heat and Pressure
type of rock that begin from a previous rock type.
METAMORPHIC ROCKS
is the pervasive planar structure that results from the nearly parallel alignment of sheet silicate minerals and/or compositional and mineralogical layering in the rock.
Foliation
high temperature
MAKES ROCKS MORE COMPACT AND MAY ARRANGE MINERALS INTO LAYERS.
high pressure
METAMORPHIC ROCKS ARE GROUPED INTO 2
FOLIATED & NON FOLIATED
Give an example of foliated rocks
SLATE, SCHISS, GNEISS
Give an example of non foliated
QUARTZITE, MARBLE, ANTHRACITE COAL
PERTAINS TO THE TEMPERATURE AND/OR PRESSURE CONDITION(S) TO WHICH A ROCK HAS BEEN SUBJECTED DURING METAMORPHISM.
Metamorphic Grade
Shale is an example of what: Foliated or Non-foliated rock
Foliated Rock
Schiss is an example of what: Foliated or Non-foliated rock
Foliated Rock
Marble is an example of what: Foliated or Non-foliated rock
Non-foliated Rock
This foliated rock forms from shale or mudstone and contains quartz and clay minerals.
Slate
Which parent rock forms into quartzite?
Sandstone
In the chart, which two minerals remain stable throughout the entire metamorphic range from low to high grade?
Quartz and Feldspar
Which metamorphic rock forms just before melting occurs at the highest grade?
Gneiss
If a shale undergoes metamorphism to ~750°C, which two minerals dominate its mineral composition?
Garnet and Sillimanite
At approximately what temperature range does muscovite (mica) become unstable, giving way to sillimanite?
~700–800°C
Which mineral is stable across both low- and intermediate-grade metamorphism but disappears before high-grade conditions?
Chlorite
Name the sequence of foliated rock types it becomes, in order.
This foliated metamorphic rock can form from shale, schist, granite, or sandstone, contains quartz and feldspar, and usually develops under high-grade metamorphism when sillimanite appears. What is it?
1. Shale → Slate → Phyllite → Schist → Gneiss
2. Gneiss