Question

1.
Which of the following statements is TRUE? Horizontal layers in sedimentary rocks are called "beds". Evaporites (e.g., rock salt) have a purely biological origin. Shale is a coarse-grained rock. A clastic sedimentary rock is one that forms from the precipitation of calcite from seawater

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Answer 1

Dear Student,

The answers are as follows,

Ans: 1. TRUE - Horizontal Layers in sedimentary rocks are called beds

Explanation: The shale is not coarse-grained rock, Clastic sedimentary rocks will not be formed due to the precipitation of calcite from sea water, A bed is defined as the layer of rock that has uniform lithology and texture so, the horizontal Layers in sedimentary rocks are called beds

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Ans: 2. A Large Earthquake

Explanation: A large earthquake with its vibrations and wave transmissions, it can trigger the rapid mass wasting process

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Ans: 3. Flood Plain

Explanation: (Definition) Flood plain is an area or flat surface next to the river that is periodically inundated by the flood water

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Ans: 4. Back and Forth

Explanation: As There is no angular curvature in the cross-sectional view of the ripple wave we determine the direction wither it is flowing from left to right or from right to left. But there is an existence of sinusoidal wave, we can say that the movement of direction might be back and forth

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Ans: 5. Anticline

Explanation: (Definition) An arch-shaped structure of deformed sedimentary rocks is called an anticline

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Ans: 6. Rock fall

Explanation: In rock falls, The movement of rock blocks, stones, gravels etc., while in the landslide is a cohesive mass of soil, that comes into movement or slide

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Ans: 7. Alignment of platy minerals (i.e., muscovite and biotite) during squeezing and shearing of the rocks

Reference: A study on Cleavage and schistosity by John G Dennis

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Ans: 8. Normal faults

Explanation: Normal faults occur when the rock beds are in tension.

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Ans: 9. Has not traveled very far from its source area

Explanation: If the clastic sediment is coarse and angular means it is clearly indicating the distance traveled by the sediment is not very far from its source, if it has travelled then it must not be coarse-grained as it subjects to friction, its particles get eroded during its travel and make it a fine-grained.

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Ans: 10. Compression forces

Explanation: Compressive forces are dominant at convergent boundaries, Shearing forces are dominant at transform fault boundaries, tension forces are dominant at divergent boundaries.

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Ans:11. Weathering, Transportation, Deposition, Lithification

Explanation: the first and foremost step for the formation of sedimentary rocks is weathering and then it is transported by mostly water then deposited at some region offering favorable conditions. Then in the dye course of time lithification process will be done.

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Ans: 12. Garnet

Explanation: Garnet is the good (Pressure-Temperature sensitive) Index mineral in metamorphic rocks

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