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Schist is a type of rock that is primarily formed through regional metamorphism. This process occurs over large areas under high pressure and temperature, typically associated with tectonic forces. Schist is characterized by its well-developed foliation and often contains visible mineral grains, such as mica, which give it a shiny appearance. Other metamorphic rocks can form through different processes, but schist is distinctly linked to regional metamorphism.
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What type of rock can only form deeply underground?
Only an intrusive igneous rock forms underground, but you can argue that all metamorphism occurs underground. The issue here is that when the metamorphism is thermal, often the ground it is under has only just been formed (i.e. a lava flow). To avoid confusion, only regional metamorphism can take place underground. The rocks formed by regional metamorphism and intrusive magma cooling are rocks with crystalline texture.
What rocks are formed by changes in heat and pressure or the pressure of hot watery fluids?
Metamorphic Rocks are formed two ways: Regional Metamorphism Contact Metamorphism In regional, two plates collide and through pressure and friction to change igneous rock to metamorphic. In contact (more familiar to me) lava (hot liquid?) contacts any type of rock and doesn't not melt but sorta loosens it up so the crystals inside can rearrange.
What kind of rock is formed by metamorphism of limestone or dolomite?
marble
Which type of metamorphic rock means formed in fire?
Thermal metamorphism.
What type of rock is formed exclusively from contact metamorphism?
Hornfels is a type of rock that is formed exclusively from contact metamorphism. It is typically fine-grained and formed when existing rocks are subjected to high temperatures and pressures from nearby magma intrusions.
What type of rock can only form deeply underground?
Only an intrusive igneous rock forms underground, but you can argue that all metamorphism occurs underground. The issue here is that when the metamorphism is thermal, often the ground it is under has only just been formed (i.e. a lava flow). To avoid confusion, only regional metamorphism can take place underground. The rocks formed by regional metamorphism and intrusive magma cooling are rocks with crystalline texture.
What is sedimentary rock formed by deposit of shale?
Slate is the metamorphic rock, formed from regional (heat and pressure applied) metamorphism on shale.
Why are metamorphic rocksformed by contact metamorphism usually not as dense as those formed by regional metamorphism?
Because contact metamorphism usually occurs because of an increase in temperature. In contrary, regional metamorphism is usually the result of compression. Compression makes a rock more dense.
Why are metamorphic rocks formed by contact metamorphism usually not as dense as those formed by reg?
Because in contact the rock actually comes in contact with magma, this joins with the rock, so when it cools and become igneous rock, it's denser. In regular, or regional, the rock is formed from intense heat and pressure, but does not actually come in contact with magma.
Why are metamorphic rocks formed by contact metamorphism usually not as dense as those formed by regional metamorphism?
Contact metamorphism does not cause profound compaction, which is the reduction in size of the spaces between mineral particles due to increases in pressure. Regional metamorphism causes compaction and possibly recrystallization, increasing the density of the rock.
which rock is only formed by regional metamorphasim?
The heat generated by the magma chamber has changed these sedimentary rocks into the metamorphic rocks marble, quartzite, and hornfels. Regional Metamorphism occurs over a much larger area. This metamorphism produces rocks such as gneiss and schist.
Which rock is only formed by regional metamorphism?
Schist is a rock that is primarily formed through regional metamorphism. This process occurs under high pressure and temperature conditions, typically associated with tectonic forces during mountain-building events. Schist is characterized by its foliated texture and is often composed of minerals like mica, garnet, and quartz, which align parallel to each other due to the intense pressure.
Which type of metamorphism affects the greatest volumes of rock?
Regional metamorphism affects the greatest volumes of rock. This type of metamorphism occurs over a large area and at significant depths within the Earth's crust, leading to the alteration of extensive rock formations.
What most metamorphic rock forms as a result of?
regional metamorphism
Describe two ways a rock can undergo metamorphism?
Either by melting or by deposition.
What two geological processes are involved in changing sedimentary rock to a metamorphic rock?
The two processes resulting from sedimentary into metamorphic rock are known as contact metamorphism and regional metamorphism. Regional metamorphism most notably involves two tectonic plates colliding, while contact metamorphism occurs due to the intrusion of magma.
What is the difference between regional and contact metamorphism?
Regional metamorphism is the creation of metamorphic rock from large geographically significant processes like plate tectonics. Contact metamorphism is the creation of metamorphic rock from the proximity of an existing rock to a heat source provided by a plutonic intrusion.
