بيت /types of metamorphic rocks in kenya
Oct 18, 2019· Metamorphic rocks are formed when a preexisting rock, called a protolith, is under conditions of high heat and pressure, causing it to metamorphose chemically, structurally, or both. The protolith might be an igneous, sedimentary, or another metamorphic rock. Slate, marble, and quartzite are some examples of this type.
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tain widespread distribution of metamorphic rocks in the continental crust,especially among the older rocks,is evidence that Earth's crust has been deformed parts of the oceanic crust are also the mantle is made mostly of a type of metamorphic rock. ORIGIN OF METAMORPHIC ROCKS
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Metamorphic rocks are largely grouped into foliated and nonfoliated rocks. Types of Metamorphic Rocks. There are two main types of metamorphic rocks. These are Foliated metamorphic rocks and Nonfoliated metamorphic rocks. Foliated Metamorphic Rocks ; Foliated metamorphic rocks are formed from direct exposure to pressure and heat.
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Feb 23, 2018· One of the oldest types of rocks on our planet, metamorphic rocks are mainly formed due to changes in the parameters of temperature and pressure, which act on the parent material. Their study provides us with important data regarding formation of the Earth and the past geological environment. Read this ScienceStruck article to gain extensive information about the main features of these rocks.
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The other two main types are sandstone (made from sand, duh) and shale that's made from mostly mud. Basically, if it didn't form from molten magma, it's sedimentary – unless of course it formed from heat and pressure, making it the next type of rock. Metamorphic Rock. Metamorphic rocks form when tremendous heat and/or pressure is added to a rock.
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Metamorphic Rock •Metamorphic rocks are formed when preexisting rocks are exposed to extreme heat and pressure •Metamorphic rocks are found deep within Earth's crust, so there is a lot of rock on top pressing down. •Rocks that become metamorphic are so .
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Metamorphic rocks are catagorized into two main types: foliated and nonfoliated. Three examples of foliated metamorphic rocks are gniess, slate and schist. Some nonfoliated rocks include marble ...
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Mar 06, 2014· A rock refers to a solid accumulation of minerals situated in the lithosphere. Generally, rocks are classified into metamorphic, igneous and sedimentary rocks. The classifications are based on their textural, mineral and chemical composition. Here is a list of the types of rocks.
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The feldspar deposit was found to fall under the Turoka series of rocks named by Joubert, 1957. This is a series of rocks that comprise the limestone group and the quartzite group. The limestone group comprise the banded pelitic gneisses migmatites with prominent calcareous and subordinate semicalcareous, semipelitic and psammitic types.
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Metallurgical ContentCrystalline LimestoneSlatePhylliteGraywackeQuartziteGneissSchistsSerpentineSoapstone or StealiteWhat is MetamorphismDefinition of Metamorphism: Rocks that have been formed from other rocks, sedimentary and igneous, by internal changes caused by pressure, heat, and the chemical action of the solutions .
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S Banded iron formation – a fine grained chemical sedimentary rock composed of iron oxide minerals. S Bauxite – the main ore of aluminium. It is mostly aluminium oxide. I Basalt – grey/black finegrained rock from lava which cooled on the surface of the Earth. S Blue Lias – a formation of rocks, part of the Jurassic Coast World Heritage Site.
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Metamorphic rocks are formed from the alteration of preexisting rock types (igneous, sedimentary or already formed metamorphic rocks) through metamorphism. The preexisting rock, also known as protolith, is subjected to both heat and pressure, which causes chemical or physical changes. These types of rocks form a huge part of the Earth's.
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The word comes from the Latin folium, for leaf. Geologists use foliation to refer to the parallel surfaces and/or layers that can occur in a metamorphic rock. Foliation can give metamorphic rocks a striped or streaked appearance in an outcrop, and/or can give them the ability to split into thin sheets.
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Jan 12, 2015· The types of rock: igneous, metamorphic and sedimentary The three main types of geological rocks are described. They are...
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