GEOLOGY
STRATIGRAPHY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Conformable deposition contact
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Angular unconformity
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Disconformity
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Unconformity
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Detailed explanation-1: -Two types of contact between conformable strata: abrupt contacts (directly separate beds of distinctly different lithology, minor depositional break, called diastems) and gradational contact (gradual change in deposition, mixing zone). Unconformable: period of erosion/non-deposition.
Detailed explanation-2: -Conformable contacts represent no time gap in the geologic record. They are usually planar, though they may have slightly irregular topography. These contacts represent continual, uninterrupted deposition and accumulation of sedimentary rocks, or represent lava flows.
Detailed explanation-3: -If there is an interruption in sedimentation, such that there is a measure able gap in time between the base of the sedimentary unit and what lies beneath it, then we say that the contact is unconformable.
Detailed explanation-4: -ANGULAR UNCONFORMITIES. DISCONFORMITIES. NONCONFORMITIES.