Unconformity Break in the geologic record Evidenced by: – Erosion – Folding and/or faulting – Igneous intrusions or lava flows Nonconformity Unconformityin which strata of sedimentary rock rests on igneous or metamorphic rock layers. Igneous Rock Angular Unconformity Boundary between horizontal and distorted (tilted or folded) strata. Deposition Distortion Deposition Sedimentation Angular Unconformity Deformation An angular uncoformity marks a significant time gap in the geological Erosion column. Renewed Sedimentation Disconformity Boundary between layers of rock that have not been deposited continuously.
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