1. Which sequence below is the correct order (oldest to youngest) in which rocks formed in this figure?
a. GBFEAD
b. FDAEBG
c. DAEBFG
d. GBEFAD
e. DAEFBG
f. DAFEBG
2. The boundary between B and F represents what type of unconformity?
a. angular unconformity
b. nonconformity
c. disconformity
3. The boundary between A and D represents what type of unconformity?
a. disconformity
b. nonconformity
c. angular unconformity
4. Roc unit F is a plutonic igneous rock. Using radiometric dating techniques, you estimate that this rock first formed 260 million years ago. Which statement below must be true?
a. E is older than 260 mil years old
b. B is older than 260 mil years old
c. A is younger than 260 mil years old
d. E is younger than 260 mil years old