unconformity

Unconformity refers to a gap in the geological record, where layers of rock are missing due to erosion or non-deposition. It occurs when periods of time are not represented in the rock strata, meaning that some geological events are not recorded. This can happen when older rock layers are worn away before new layers are deposited on top. Unconformities help geologists understand Earth's history, revealing changes in environmental conditions and the processes that shape the planet over time.