Quiz # 25



#1 Sedimentary rocks are derived through.

Sedimentary rocks are formed when sediment is deposited out of air, ice, wind, gravity, or water flows carrying the particles in suspension. This sediment is often formed when weathering and erosion break down a rock into loose material in a source area.

#2 Sandstone is a _____

Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) mineral particles or rock fragments. Most sandstone is composed of quartz or feldspar (both silicates) because they are the most resistant minerals to weathering processes at the Earth’s surface

#3 Dynamic metamorphism occur due to___

Metamorphism is the change of minerals or geologic texture in pre-existing rocks, without the protolith melting into liquid magma. The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids.There are several different types of metamorphism, including dynamic, contact, regional, and retrogressive metamorphism, that form and shape rocks.Dynamic metamorphism involves high shear stress, high pressure, high strain, high fluid partial pressure and variable temperature.

#4 Which among the following are mechanically formed rocks?

Clastic sedimentary rocks such as breccia, conglomerate, sandstone, siltstone, and shale are formed from mechanical weathering debris.

#5 The processes which include geological phenomena and processes that originate externally to the Earth’s surface are called as _____

The processes which occur on earth’s surface due to the influence of exogenic forces are called as exogenic processes or exogenic geomorphic processes. Weathering, mass wasting, erosion, and deposition are the main exogenic processes

September 19, 2019

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