types of metamorphic rocks in kenya

Metamorphic Rocks - Tulane University

Metamorphic Rock Types There are two major subdivisions of metamorphic rocks. Foliated – These have a planar foliation caused by the preferred orientation (alignment) of minerals and formed under differential stress. They have

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22 Jimena eryka rocks.docx - Rocks Metamorphic Metamorphic

Rocks Metamorphic Metamorphic rock different types of minerals in the metamorphic rocks 1. index minerals 2. sillimanite 3. kyanite 4. staurolite 5. andalusite 6. garnet 7. olivines 8. pyroxenes 9. amphiboles 10. micas 11. feldspars

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Top 6 Types of Metamorphism | Geology

ADVERTISEMENTS: Metamorphic changes of orignal rocks into new types of rocks can happen in the following ways:-1. Contact or Thermal Metamorphism 2. Hydrothermal Metamorphism 3. Regional Metamorphism 4. Burial Metamorphism 5. Plutonic Metamorphism 6. Impact Metamorphism. Type # 1. Contact or Thermal Metamorphism: This type of metamorphism takes place when the very hot magma moves []

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Metamorphic Rocks and the Rock Cycle

Classifying Metamorphic Rocks by Different Types of Textures Texture is used to describe the size, shape, and arrangement of grains within a rock. The different textures of mineral grains within metamorphic rocks are used

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Different types of metamorphic rocks are distinguished by the

Different types of metamorphic rocks are distinguished by the: a. chemical make-up of the rock. c. location of the rock formation. b. location in which the rock was found. d. arrangement of mineral grains within the rock.

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Metamorphic Rocks: Meaning and Classification

3. Foliation in Metamorphic Rocks: We know one of the causes of metamorphism is pressure. The rock minerals when squeezed under conditions of high pressure are forced to change. Metamorphic rocks may be subjected to two types of pressure as shown in Fig. 14.5 viz. indirect and direct pressures.

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Basement (geology) - Wikipedia

Continental crust. Basement rock is the thick foundation of ancient, and oldest, metamorphic and igneous rock that forms the crust of continents, often in the form of granite. Basement rock is contrasted to overlying sedimentary rocks which are laid down on top of the basement rocks after the continent was formed, such as sandstone and limestone.The sedimentary rocks which may be deposited on

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7.2: Classification of Metamorphic Rocks - Geosciences

2020/08/11 · Table 7.1 A rough guide to the types of metamorphic rocks that form from different parent rocks at different grades of regional metamorphism. Parent Rock Very Low Grade (150-300 C) Low Grade (300-450 C) Medium

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7.2: Classification of Metamorphic Rocks - Geosciences LibreTexts

The various types of foliated metamorphic rocks, listed in order of the grade or intensity of metamorphism and the type of foliation are: slate, phyllite, schist, and gneiss (Figure \(\PageIndex{4}\)). As already noted, slate is formed from the low-grade metamorphism of shale, and has microscopic clay and mica crystals that have grown

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7.2 Classification of Metamorphic Rocks - Physical Geology

The various types of foliated metamorphic rocks, listed in order of the grade or intensity of metamorphism and the type of foliation are: slate, phyllite, schist, and gneiss (Figure 7.2.4). As already noted, slate is formed from the low-grade metamorphism of shale, and has microscopic clay and mica crystals that have grown perpendicular to the

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Types of Rocks - Igneous | Sedimentary Rocks | Metamorphic

Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock is subjected to heat with temperatures greater than 150 to 200°C and pressure around 1500 bars, causing profound physical and/or chemical change.

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