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What is low-grade metamorphism?
Alow-grade metamorphism is when the rock turns to shale,a sedimentary rock then to slate
Slate is associated with high-grade metamorphism?
No Slate is associated with a low-grade metamorphism
Is soapstone regional or contact metamorphism?
Very low grade regional metamorphism.
Is Kyanite is an index mineral of a low grade metamorphism?
No, kyanite is an indicator of high pressure metamorphism.
What is the difference between low grade and high grade metamorphism?
One is high and one is low.
What are the three main types of metamorphism Compare and contrast the factors that cause each type?
The three main types of metamorphism are: Regional Metamorphism Contact Metamorphism Hydrothermal metamorphism Regional metamorphism is caused when high temperature and pressure affect large regions of Earths crust, It can range from low grade to high grade. It causes folded rock layers. Contact Metamorphism is when molten material comes in contact with solid rock. High temperature and moderate to low pressure from mineral assemblages. Metamorphic effects decrease with distance. Hydrothermal Metamorphism is when very hot water reacts with rock and alters its chemical and mineral composition. As hot fluids migrate in and out of the rock during metamorphism the original mineral composition and texture of the rock change.
What are the Levels of metamorphism?
Metamorphic rock is given a grade from low to high depending on the amount of change it has undergone.
Does metamorphic rock change?
Metamorphic rock can undergo a series of changes called degrees of metamorphism, from low-grade to high-grade.
What Metamorphic rock is the result of lowest level of compaction applied to shale?
Slate is the product of low grade metamorphism of shale.
Are some rocks metamorphic AND sedimentary?
No. If a sedimentary rock has undergone even a low grade metamorphism, it is considered a metamorphic rock.
How was talc formed?
Talc is formed by the hydrothermal alteration of ultrabasic rocks, or low grade thermal metamorphism of siliceous dolomites.
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.
