The phrases that apply to metamorphic rock formation are:
- form from existing rocks - Metamorphic rocks are formed from pre-existing igneous, sedimentary, or other metamorphic rocks.
- form without melting - Metamorphic rocks form through recrystallization and other processes that do not involve melting.
- appear foliated or non-foliated - Foliation refers to the layered appearance of some metamorphic rocks, while others can be non-foliated.
- require heat and pressure to form - The formation of metamorphic rocks typically involves high temperatures and pressures deep within the Earth's crust.
The phrases that do NOT apply are:
- form from liquid rock - This phrase applies to igneous rocks formed from molten rock (magma or lava).
- form from deposition - This phrase applies to sedimentary rocks, which are formed from the accumulation and compaction of sediment.
So, the applicable phrases are:
- form from existing rocks
- form without melting
- appear foliated or non-foliated
- require heat and pressure to form
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