it is called the letter of Vromigant, the layer below the level of Tresments
No.
both are correct metamorphic rock can form from both.
If the rock melts the resulting rock type would be igneous rather than metamorphic.
If it is squeezed and heated sufficiently to realign the minerals or form new minerals, it is called a metamorphic rock. If it is squeezed and heated enough to melt, then solidify, it would be called an igneous rock.
Most metamorphic rock processes involve very long periods of time. The exception would be metamorphic rocks formed by meteorite impacts.
metamorphic because it melts the rock and forms another
the
Melting of the bulk of the metamorphic rock, then solidification from cooling, will form an igneous rock.
A metamorphic rock is most likely to form in an earthquake zone.
It would remain metamorphic rock.
heat and pressure is applied to the rock and it becomes a metamorphic rock.
Yes. Most likely it would become a metamorphic rock of higher grade. Slate is a low grade metamorphic rock. With increased heat and pressure it will become schist, a high grade metamorphic rock.