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What is the texture used to identify the highest degree of regional metamorphism in a foliated rock?
Wiki User
∙ 15y ago
Gneissic texture is used to identify the highest grade of metamorphic rock that still displays foliation. Granulite is the highest grade metamorphic rock, period, but does not display foliation due to the instability of sheet silicates.
Wiki User
∙ 15y ago
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What rock forms at the highest grade of regional metamorphism?
Schist is the highest grade metamorphic rock of those listed in the question.
Which kind metamorphic rock most likely form in the high temperatures and pressures?
At the highest temperatures and pressures, high-grade metamorphism occurs forming high-grade metamorphic rocks. The main example of this is gneiss.
If metamorphism causes a rock to melt would the rock that results still be consider a metamorphic rock?
=== === Metamorphism does not cause a rock to melt. If a rock melts, then solidifies, it is by definition an igneous rock. There are rocks called granulites which represent the highest grade of metamorphism, and some may have experienced a partialmelting.
What type of coal has undergone the greatest change?
Anthracite coal has been through low-grade metamorphism to become the highest grade of coal. This type of coal has the highest carbon count and the fewest impurities of any other type of coal.
Can a metamorphic rock become further metamorphic?
Yes, additional pressure and heat will lead to further metamorphism. The reference used to describe this is called the 'degree of metamorphism'. For instance, the sedimentary rock shale can become the low grade metamorphic rock slate. In the next degree of metamorphism, slate can become phyllite. Phyllite can then become schist, and finally gneiss. Migmatite is the highest grade metamorphic rock, but has been partially melted.
What rock forms at the highest grade of regional metamorphism?
Schist is the highest grade metamorphic rock of those listed in the question.
Which kind metamorphic rock most likely form in the high temperatures and pressures?
At the highest temperatures and pressures, high-grade metamorphism occurs forming high-grade metamorphic rocks. The main example of this is gneiss.
If metamorphism causes a rock to melt would the rock that results still be consider a metamorphic rock?
=== === Metamorphism does not cause a rock to melt. If a rock melts, then solidifies, it is by definition an igneous rock. There are rocks called granulites which represent the highest grade of metamorphism, and some may have experienced a partialmelting.
Which metamorphism rocks are most likely to have at the highest temperature and pressure?
Gneiss is a metamorphic rock that meets those criteria.
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What type of coal has undergone the greatest change?
Anthracite coal has been through low-grade metamorphism to become the highest grade of coal. This type of coal has the highest carbon count and the fewest impurities of any other type of coal.
Can a metamorphic rock become further metamorphic?
Yes, additional pressure and heat will lead to further metamorphism. The reference used to describe this is called the 'degree of metamorphism'. For instance, the sedimentary rock shale can become the low grade metamorphic rock slate. In the next degree of metamorphism, slate can become phyllite. Phyllite can then become schist, and finally gneiss. Migmatite is the highest grade metamorphic rock, but has been partially melted.
Which metamorphic rocks are mostly likely to have formed at the highest temperatures and pressures?
Gneiss is a Plutonic metamorphic rock which is formed under high pressure and temperature condition at Katazone or Lower Zone.
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