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What makes up about 95 percent of the rocks in earths crust?
Igneous and metamorphic rock make up 95% of the rocks in Earth's crust. Only a thin layer is made up of sedimentary rock.
What is the difference between the igneous and metamorphic rocks?
Igneous rocks are formed when rocks reach the melting point becoming magma, then the magma starts to cool and crystallizes to form igneous rocks. Metamorphic rocks are made when they come in contact with a mass of magma but does not melt providing the energy to drive chemical reactions that recrystallize minerals.
What are the soft silicate flakes found in many rocks?
The soft silicate flakes found in many rocks are likely to be mica minerals, such as muscovite or biotite. These minerals have a layered structure that allows them to break into thin flakes or sheets easily. Mica minerals are common in igneous, metamorphic, and sedimentary rocks.
Why are rift zones common places for igneous rocks to form?
The thin crust of a rift zone causes melting in the upper mantle, resulting in volcanic activity.
How can you compare igneous and sedimentary rocks?
Extrusive rocks are... extruded... onto the surface as the lava that we all think of. It cools fairly quickly, into rocks with fairly small crystals (might need a magnifying lens to see them). The exact chemistry of the parent magma will determine the type of rock. Oceanic volcanoes are generally basaltic (mafic or ultramafic), continental are generally granitic (felsic or intermediate). They're put down in "relatively thin" layers Intrusive rocks cool for thousands of years beneath the surface in huge plutons or batholyths. This allows them to grow very large crystals (easily seen by the unaided eye). These intrusive rocks are almost always granitic-type rock. My sources are: from my science teacher who worked at the science museum yahooanswer.com ask.com wikipedia the free encyclopedia I hope this information helped. Good luck!
Thin layers of rocks and minerals on earths surface called?
These thin layers are called sedimentary rocks, which are formed from the accumulation and compression of sediments over time. Sedimentary rocks are one of the three main types of rocks found on Earth's surface, along with igneous and metamorphic rocks.
What is the negative of thin?
brittle
Why are rift zones common places for igneous rocks?
The thin crust of a rift zone causes melting in the upper mantle, resulting in volcanic activity.
What makes up about 95 percent of the rocks in earths crust?
Igneous and metamorphic rock make up 95% of the rocks in Earth's crust. Only a thin layer is made up of sedimentary rock.
What rocks contain mica?
I'm not sure of the specifics, but metamorphic rocks usually have it. Yo face
What is the difference between the igneous and metamorphic rocks?
Igneous rocks are formed when rocks reach the melting point becoming magma, then the magma starts to cool and crystallizes to form igneous rocks. Metamorphic rocks are made when they come in contact with a mass of magma but does not melt providing the energy to drive chemical reactions that recrystallize minerals.
What is a sentence using the word opaqueness?
"The opaqueness of its atmosphere hides the surface of Venus from our view." "Most forms of igneous rocks have a quality of opaqueness unless cut into very thin slices.
What happens to Bones not subjected to ordinary stress?
They become thin and brittle.
What is a shiny mineral that occurs in sheets?
Mica is a shiny mineral that occurs in sheets. It is composed of thin, flat sheets that can easily be peeled apart. Mica is commonly found in igneous and metamorphic rocks.
Why are sedimentary rocks found as a thin layer covering most of the the continental igneous rocks?
Sedimentary rocks are the result of broken down igneous rocks so they cover up most of igneous rocks.
What are the soft silicate flakes found in many rocks?
The soft silicate flakes found in many rocks are likely to be mica minerals, such as muscovite or biotite. These minerals have a layered structure that allows them to break into thin flakes or sheets easily. Mica minerals are common in igneous, metamorphic, and sedimentary rocks.
How do intrusive and extrusive igneous rocks form?
Igneous rocks are formed when magma crystallizes and cools into a solid form. There are two types of igneous rocks--intrusive igneous rocks and extrusive igneous rocks.Intrusive:Intrusive igneous rocks are formed when the melted rock (magma) slowly rises toward, but does not reach the surface. As these pockets of magma cool slowly underground, minerals crystallize and the magma solidifies, becoming intrusive igneous rock, like granite and gabbro.Extrusive:Igneous rocks are also formed when volcanoes erupt, causing the magma to rise above the Earth's surface. When magma appears above the surface, it is called lava. Extrusive igneous rocks are formed as the lava cools above ground. Examples of extrusive igneous rock are basalt, rhyolite, pumice, and scoria.igneous rocks are formed by lavaWell When melted rock cools quickly, it hardens before any mineral crystals can grow large. as a result, igneous rocks that form above ground have small or no crystals :)Igneous Rocks are made of magma and lava because it comes out of a volcanoFrom volcanoes.from lava cooling.Molten rock cools and turns solid.
