9:54 6 The formation of Bedding plane markings are the result of Erosion and Dep
ID: 287899 • Letter: 9
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9:54 6 The formation of Bedding plane markings are the result of Erosion and Deposition s Deformation of soft sediment Biogenic Action e None of the above. 7. Current ripples and dunes are 4 All of the above Common structures in modem and ancient Formed by the action of wind or water e Formed under entirely different conditions A&C; r None of the above. 8 Deposits formed by Glacial action tend to be: aWell Sorted Poorly Sorted 4 Composed of soil and subsoil products only. s. What is a Bouma Sequence? a A carbonate reef s A set of beds and sedimentary structures deposited in turbidite flows. e Major exposure interval of 50 million years or 4 All of the above e None of the above 40 In Geology, new advances or theories separated by years or decades can advance specific areas of knowledge. Which three of the following scientists made advances in the same discipline now referred to Agassie (1840) bi Dutoit (1937) oLyell (1833) a Holmes (1928) Hutton (1785) o Hess (1962) 41. How does sphericity differ from roundness? They are the same h Sphericity describes shape, Roundness relative e Roundness describes shape, Sphericity relative 4 Sphericity refers to angularity, Roundness to pitting What is the definition of a bed? a A set of chemically dissimilar sediments h A single sedimentation unit laid down under essentially constant physical conditions c A bed is the smallest formal unit and is distinctive byExplanation / Answer
36. The bedding plane marking are formed due to erosion and deposition under very high energy conditions. These conditions are generally met by the lower flow regime of the energy conditions.
37. Current ripples and dunes are formed by both wind and water. And those are generally found in both ancient and modern days. Hence the answer is a and b.
38. The deposits of glacier tend to be highly sorted as they travel a lot and the movement generally involves the deposition of unconsolidated sediments.
39. Bouma sequence is a classic example of a sedimentary sequence which is deposited by turbidity currents. Therefore the answer will be b.
40. The scientists who made its contribution to continental drift are lyell, holmes and hess. Hence c, d and f. Lyell was the main man behind finding out changes in the earth's surface by the study of geodynamics. Holmes was the founder of seafloor spreading and Hess is considered to be the founder of plate tectonics study.
41. Sphericity and roundness is completely different from each other. Sphericity defines the shape of the grains where the equant shaped grains have higher sphericity. While roundness is just the opposite to it. Roundness defines the relative smoothness of the grains. It defines that whether the grains are round or not.
42. According to what the options are shown, the correct option here will be "b" because bed is said to be a single unit which has a constant physical properties like grain size, colour etc.
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