What Is an Unconformity? Describe the Three Types of Unconformities

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The Answer is An unconformity is a boundary between two units that represents a period of nondeposition and possibly erosion and deformation.There are there types of unconformity: angular unconformity,disconformity,and nonconformity.An angular unconformity occurs when older layered rocks are tilted or folded,and then eroded.New sediment is deposited on top of that erosional surface at an angle to the older rocks' layering.A disconformity is a boundary representing a large gap in geologic time missing from the rock record due to erosion,but with the layers above and below the boundary remaining roughly parallel.A nonconformity is a boundary between two different rock types that occurs when older igneous or metamorphic rocks are eroded and younger sedimentary rocks are deposited on that erosional surface.

What Is an Unconformity? Describe the Three Types of Unconformities

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