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An Unconformity is where there is a discontinuity in the column of material, with a different style of material taking over after the discontinuity.

The place where gravels and silts abut solid rock would be a simple example of an unconformity.

A Hiatus is merely where the same type of material exists on both sides of the discontinuity. The column of material continues, but there is a time slice missing.

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14y ago

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