Computer · Engineering Geology
An unconformity in geology is defined as:
- 1A layer of boulders and pebbles in a sequence of rocks
- 2A layer of clay or shale in an igneous mass
- 3A type of joint especially associated with folded and faulted rocks
- 4A surface of erosion or non-deposition as detected in a sequence of rocks✓
Correct answer
A surface of erosion or non-deposition as detected in a sequence of rocks
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