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Types of Unconformities

Angular Unconformities
Angular Unconformities

Angular Unconformity is a type of rock unconformity in which depositions of horizontally parallel strata of sedimentary rocks are formed on the eroded and tilted layers of nearby sedimentary rocks. Due to this formation an angular discordance is created with the overlying horizontal layers.

Disconformities
Disconformities

Disconformities are marked by features of subaerial erosion. This type of erosion can leave channels and paleosols in the rock record. A paraconformity is a type of disconformity in which the separation is a simple bedding plane with no obvious buried erosional surface.

Disconformities
Disconformities

Disconformities are marked by features of subaerial erosion. This type of erosion can leave channels and paleosols in the rock record. A paraconformity is a type of disconformity in which the separation is a simple bedding plane with no obvious buried erosional surface.

Nonconformities
Nonconformities

Nonconformities are unconformities that separate igneous or metamorphic rocks from overlying sedimentary rocks. They usually indicate that a long period of erosion occurred prior to deposition of the sediments (several km of erosion necessary).

source: indiana.edu

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