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An erosional surface that is parallel to the layers both above and below it is known as a ________________________.

User Emad Adly
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10 votes

Answer:

Disconformity

Step-by-step explanation:

Disconformities are usually erosional contacts that are parallel to the bedding planes of the upper and lower rock units.

Since disconformities are hard to recognize in a layered sedimentary rock sequence, they are often discovered when the fossils in the upper and lower rock units are studied.

A gap in the fossil record indicates a gap in the depositional record, and the length of time the disconformity represents can be calculated.

Disconformities are usually a result of erosion but can occasionally represent periods of non-deposition.

User Alexandre Catalano
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