GEOLOGY
STRATIGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Disconformity is at an angle to the underlying rock layers.
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Disconformity does not involve erosion at all.
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The rocks below the disconformity are tilted or folded.
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Disconformity is usually parallel to the rocks above and below it.
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Detailed explanation-1: -Disconformities are usually a result of erosion but can occasionally represent periods of nondeposition. Nonconformities. A nonconformity (Figure 2) is the contact that separates a younger sedimentary rock unit from an igneous intrusive rock or metamorphic rock unit.
Detailed explanation-2: -Disconformity: exists where the layers above and below an erosional boundary have the same orientation. Nonconformity: develops where sediments are deposited on top of an eroded surface of igneous or metamorphic rocks.
Detailed explanation-3: -A paraconformity is a type of unconformity in which the sedimentary layers above and below the unconformity are parallel, but there is no obvious erosional break between them. A break in sedimentation is indicated, for example, by fossil evidence.
Detailed explanation-4: -A disconformity is an unconformity between parallel layers of sedimentary rocks which is a period of erosion or non-deposition. Disconformities are characterized by subaerial erosion features. This type of erosion may leave in the rock record channels and paleosols.
Detailed explanation-5: -True/False: A disconformity occurs above tilted rock layers. False; an angular unconformity occurs above tilted rock layers.