Examine the three movies below and identify what features were formed before the unconformity.  Then read  the description beneath each movie to check your results. These three movies illustrate the types of unconformities you'll see in this section.


Rotate block

Rotate block Rotate block

Layers were deposited, tilted gently, and then eroded.  Some time later, new layers were deposited on top of the unconformity. 

Layers were deposited, folded, and then eroded.  New layers were then deposited on top of the unconformity.

Layers were deposited, then tilted gently and faulted, and then eroded.  New layers were deposited on top of this unconformity.

Unconformity Examples