Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Unconformity

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_2635

An unconformity is an ‘unconformable contact’. It forms when there is a substantial interruption in sedimentation or the formation of a lacuna, and the sequence of palaeontological evolution is discontinuous. This evidence indicates that the ages of the rocks are different. The types of unconformities include angular unconformities, parallel unconformities and disconformities.

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