Unit A is a sandstone
Unit B is a shale
Unit C is a limestone
Unit D is a gabbro that is 300 million years old which bakes the rocks above and below
Feature E is a fault
Unit F is a conglomerate
Unit H is a till deposit
Unit G is a basalt that is 100 million years old
- Which is the oldest sedimentary rock unit?
A
B
C
D
- The sequence A, B, and C represent a _____________ event.
regressive
transgressive
- Unit D "baked" (the short lines) units B and C. Therefore, ________
unit D is a lava flow
unit D is a dike
unit D is a sill
unit D is a laccolith
- Which is the best sequence of events - from oldest to youngest.
A,B,C,D,folding
A,B,D,C,folding
A,B,D,folding,C
A,B,C,folding,D
- What type of fault is E?
normal
reverse
thrust
strike-slip
- Which is older, the folding event or the faulting event?
the faulting is older because of the principle of superposition
the faulting is older because of the principle of cross-cutting relationships
the faulting is younger because of the principle of superposition
the faulting is younger because of the principle of cross-cutting relationships
- The contact between units F and C is a(n) ____________
disconformity
non conformity
angular unconformity
none of the above
- Unit G does not bake unit H. Therefore unit G could be a
dike
sill
laccolith
shield volcano with a feeder pipe
- How specific can you be about the absolute age of faulting E?
E is greater than 300 million years old
E is less than 300 million years old
E is less than 300 million years old but older than 100 million years.
E is less than 100 million years in age
- How specific can you be about the absolute age of the glacial deposit H?
H is greater than 300 million years old
His less than 300 million years old
H is less than 300 million years old but older than 100 million years.
H is less than 100 million years in age