0
Regional Metamorphism
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
How is volcano eruption occur?
There are hot gases mixed with magma. Sometimes the pressure of the magma and hot gases increased a great deal when this happens the rocks deep inside the earth have melted on molten rocks which is called magma. This is how a magma occurs.
What are rocks that form when magma cools underground?
A pluton is a body of rock formed from the cooling of magma under the surface.
How do sedimentary rocks becomes igneous?
Sedimentary rocks, as a rule, must first undergo a change into a metamorphic rock (a process which can take hundred of thousands to millions of years), before they may become molten from subduction processes or contact with a body of magma, whereby the magma would cool and form an igneous rock.
How can you get different igneous rocks from the same magma body?
Magma underground may differentiate and form different intrusive igneous rock. Magma from the magma body may erupt, cool, quickly, and form fine-grained extrusive igneous rock, or partially remain underground and form intrusive igneous rock. The type of igneous rock formed from the magma body will largely depend on whether or not it is erupted, and the speed of its cooling.
What is a volcanic dike?
A dike is an intrusive body of volcanic magma that pushes it's way between layers of rocks and sediment.
Is magma the source of all rocks on earth?
No, while all rocks on Earth were molten at one point, most rock types do not form from magma. Rocks that form from magma or lava are igneous rocks. Most of the rocks at Earth's surface are sedimentary. These rocks form from the remains of rock that have been broken own into tiny pieces or dissolved in water. These components eventually settle, usually in a body of water, and are buried and turned to stone. Metamorphic rocks make up a third category. These form from rocks that have been altered under enormous heat and pressure while remaining solid.
Where is the dynamic metamorphism located?
Contact metamorphism is defined as metamorphism in which the mineralogy and texture of a body of rock are changed by exposure to the pressure and extreme temperature associated with a body of intruding magma. It can either happen deep underground or at the Earth's surface.
What is the process that changes the shape of rocks?
Weathering is the process that results in the reduction of size and corresponding shape of a body of rock.
Is sill a type of lava flow?
A Sill is formed when a fluid rock (usually magma but it can be mud or salt) is squeezed in between the layers (usually horizontal) of older rocks before it solidifies in place. A Dike or Dyke is the opposite, here the fluid rock penetrates across the layering of the older rocks. Logically to get the material to form a Sill there must be an accompanying feeder Dyke.
Why are fossils rarley found in igneous rocks?
Fossils are the remains or traces of animals or plants and are normally found in rocks which used to be sediments at the bottom of a body of water in which they lived or were swept into. None of these living organisms were able to live in molten magma which is what most igneous rocks used to be.
How does heat change metamorphic rock?
There are various sources of heat for metamorphism. There is the geothermal gradient from the mantle and core. There are also radioactive isotopes, intruding magma, pressure, and friction between rock bodies.
What is solid form of magma body?
When magma solidifies, it becomes igneous rock.
