ConcepTest: Angular Unconformity Sequence of Events
Question:
The diagram below shows rock units with their age in millions of years. When did crustal deformation (uplift or mountain building) occur?
a. less than 60 million years ago
b. more than 200 million years ago
c. between 60—200 million years ago
d. between 200 - 230 million years ago.
a. less than 60 million years ago
b. more than 200 million years ago
c. between 60—200 million years ago
d. between 200 - 230 million years ago.
Student Responses:
No data yet. The correct response is c.
If you would like to help acquire more Before and After statistics for this example, please contact the authors (see link at top of page).
