Consider the following statements made about sedimentary rocks 1 Sedimentary rocks are formed at the...........

Geography Earth Geology

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Consider the following statements made about sedimentary rocks:

1.Sedimentary rocks are formed at the earth's surface by the hydrological system.

2. The formation of sedimentary rocks involves the weathering of pre-existing rocks.

3. Sedimentary rocks contain fossils.

4. Sedimentary rocks typically occur in layers.

Which of these statements are correct?

1&2 only

1&4 only

2,3&4 only

All the above

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Explanation:

All the statements about sedimentary rocks are true in the given option.The sedimentary rock cover of the continents of the Earth's crust is extensive (73% of the Earth's current land surface), but the total contribution of sedimentary rocks is estimated to be only 8% of the total volume of the crust.Sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks. Sedimentary rocks are deposited in layers as strata, forming a structure called bedding. The study of sedimentary rocks and rock strata provides information about the subsurface that is useful for civil engineering, for example in the construction of roads, houses, tunnels, canals or other structures. Sedimentary rocks are also important sources of natural resources like coal, fossil fuels, drinking water or ores.