What Stories Do Rocks Tell?
ES2903  An Unconformity

Sometimes, an area where layers of sediments have been deposited is uplifted, and the surface experiences erosion. If more layers of sediments are subsequently added on top of this erosion surface, the resulting feature is called an unconformity.

  !   Examine the image and the legend below it. Use the principles of relative dating to interpret the sequence of events that would result in this set of layers. Drag the numbers onto the diagram to indicate the order in which the layers formed.




7. Identify and label the unconformity on your diagram. Number the layers from oldest to youngest.


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