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Metamorphic rocks have been changed by heat or pressure. This can be a change in size, shape, or arrangement of minerals.
If a metamorphic rock were to reach the mantle and melt, it would become magma. If that magma were then to recrystallize it would be an igneous rock.
No. Cooled lava would be igneous.
Rock salt would not form a metamorphic rock, due to its dissolution under metamorphic stresses. The solution would be forced elsewhere, but small amounts could recrystallize as a small component of another metamorphic rock.
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if it is banded or striped that would mean it is foliated if has neither then it isn't foliated
Bituminous coal is considered a sedimentary rock and therefore would not be foliated or non-foliated, terms which are used to describe metamorphic rock.
foliated or nonfoliated
foliated and nonfoliated
The rock would be described as being foliated.
No banding or alignment of a metamorphic rock's minerals would be consider non-foliated.
grains arranged in solid bands.
There should be plenty of foliated metamorphic rocks in Pennsylvania, due to the erosion of the Appalachian Mountains. Another source for foliated metamorphic rocks in Pennsylvania would be from glacial drift dropped from previous glacial episodes which were torn and transported from areas in Canada.
Those would be non-foliated metamorphic rocks, like quartzite and marble.
A non-foliated rock is a metamorphic rock that does not display a lamellar texture or distinct light and dark banding common to foliated metamorphic rocks. Non-foliated rock includes quartzite, marble, and metabasalt. Non-foliated metamorphic rocks are most often derived from single mineral sedimentary rocks like limestone and quartz sandstone. == == == ==