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What is an angular unconformity?

Angular Unconformities

If a horizontal layer of rock or sediment is underlain by a sequence of tilted rocks, you know two things:

first, the underlying rocks, if they are sedimentary or if they are lava flows, used to be horizontal - so after they were laid down, they were somehow tipped.

second, you know that you are looking at an angular unconformity - that is, there is a gap in the rock record between the tilting of the lower rocks and the deposition of the upper (horizontal) rocks.

Comments

7/17/2006 9:23:31 AM
romar u. dagupan said:

your tip is good but there is no illustration of angular unconformities

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