Defin-itions
What is metamorphism?
This terms means ‘to change in form’
What are chemically active fluids?
One of the three main agents of metamorphism: heat, pressure, or _______.
What are foliated rocks?
Metamorphic rocks with layers or bands.
What is marble?
Non-foliated rock formed from limestone.
What is protolith?
The original rock before metamorphism.
What is recrystallization?
This process forms new mineral crystals under heat and pressure.
Metamorphic rocks without layers are called?
non-foliated rocks
A high-grade foliated rock with distinct dark and light color banding.
Gneiss
What is foliation?
The planar alignment of minerals in metamorphic rocks.
Heat and pressure
What is slate?
Fine-grained foliated rock formed from shale.
Characteristics of the phyllite?
silky sheen or "gloss."
What are non-foliated metamorphic rocks?
Rocks that show no mineral layering.
What is contact metamorphism?
Metamorphism caused mainly by heat from magma.
Example of a non foliated
Marble, quartzite
What is the anthracite?
metamorphosed coal shiny and burns hotter than regular coal
What are index minerals?
Minerals that indicate temperature and pressure conditions.
What is metamorphism over large areas caused by heat and pressure?
Regional metamorphism
High-grade foliated rock with light and dark bands.
Gneiss
formed from sandstone very hard and resistant to weathering
Quartzite