5. Write about how the group of rock layers in Record A formed. Include tilting, erosion, and folding.
2 answers:
Answer:
Attached is the picture for "record A"
Explanation:
Sequences I - A were deposited layer by layer into a sedimentary basin (a region or place where subsidence of Earth's crust has allowed sediment to accumulate on top of metamorphic and igneous rock). They were subjected to Lithification and became compacted, forming sedimentary rocks. With time, the layers became tilted due to natural forces. Geologic tilting can occur as a result of faults (vertical or horizontal), angular unconformity and disturbances to the earth's magnetic field or even erosion, so possibly strata of sedimentary rock was deposited on layers that were tilted due to erosion, and the new layers were compressed on top of previously tilted layers, aggravating the tilting further. After the tilting, there was a period of non-deposition, and the exposed surface of the bed became eroded due to denudation. After this, layers H - C were deposited and compacted under pressure, by lithification. Some rock layers were exposed as the rock sequence was uplifted, and erosion washed away parts of layers C and E, and layer C has been eroded to the level of layer E. When layer C was exposed and eroded, the load was relieved and part of bed E re-adjusted to the level of C.
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