Which statements describe geologic gaps? Check all that apply.


A. Geologic gaps happen when volcanoes erupt.


B. When no sediment is deposited for a long time, angularities can result.


C. An unconformity happens when rocks do not follow normal geologic rules.


D. A geologic gap happens when rock is eroded before sediment is deposited.


E. An unconformity occurs when a rock layer’s relative age can be determined.