Geological column - PowerPoint PPT Presentation

Unconformity

Unconformity. Break in the geologic record created when rock layers are removed by erosion. Evidenced by: Erosion Time gap Distortion of strata (folding and/or faulting) Igneous intrusions or lava flows (dikes, sills, and laccoliths). Igneous Rock. Nonconformity.

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Bell Ringer: 3.18.13

Bell Ringer: 3.18.13. Read on page 157 about “The Geological Column,” what is it and why do they use pieces from all around the world?. Bell Ringer: 3.19.13. Find the relative age of the rock layers below:. Bell Ringer: 3.19.13. Bell Ringer: 3.19.13.

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