The figure below shows an imaginary sequence of rocks and geological events labeled A-I. Applying the principles of superposition and cross-cutting relationships, reconstruct the geological history of this place so you can determine the sequence (in terms of age) of the rock layers. 1. Using the principle of superposition, list the oldest to the youngest rock. _______________ 2. Rock layer H is an igneous intrusion that cuts into rock layers B-F. Which is younger, B-F or H? _____ List the oldest to the youngest rock layers. _________ 3. Fault A cuts across and displaces rock layers B-F. The fault does not cut across H, so we have no idea if it is older or younger than that rock unit. Give the sequence (from oldest to youngest) of the rock layers. _____________________ 4. G is another igneous intrusion that cuts across A-H. It is not displaced by the fault. Give the sequence (from oldest to youngest)_______________________ 5. I, is at the top of the sequence and immediately below the field. It represents an erosional surface that cuts both A and G. Combining all these, what are the relative ages of the rock layers and the geological events. Oldest ___________________ Youngest
The figure below shows an imaginary sequence of rocks and geological
events labeled A-I. Applying the principles of superposition and cross-cutting
relationships, reconstruct the geological history of this place so you can
determine the sequence (in terms of age) of the rock layers.
1. Using the principle of superposition, list the oldest to the youngest rock.
_______________
2. Rock layer H is an igneous intrusion that cuts into rock layers B-F. Which is younger, B-F or H? _____ List the oldest to the youngest rock layers. _________
3. Fault A cuts across and displaces rock layers B-F. The fault does not cut across H, so we have no idea if it is older or younger than that rock unit. Give the sequence (from oldest to youngest) of the rock layers.
_____________________
4. G is another igneous intrusion that cuts across A-H. It is not displaced
by the fault. Give the sequence (from oldest to youngest)_______________________
5. I, is at the top of the sequence and immediately below the field. It
represents an erosional surface that cuts both A and G. Combining all these, what are the relative ages of the rock layers and the geological events.
Oldest ___________________ Youngest
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