ConcepTest: Cross Section Explanation
This material was originally created for
Starting Point:Introductory Geology and is replicated here as part of the SERC Pedagogic Service.
Question:
During fieldwork in the western U.S., an experienced geologist sketched the cross section below showing three different units of tilted rocks and their relative ages. What could you best infer from this diagram?
a. Mountain building has overturned the units.
b. C formed first and so lies on the bottom.
c. B and C must be igneous rocks.
d. The sequence of rock layers conforms to the principle of superposition.
a. Mountain building has overturned the units.
b. C formed first and so lies on the bottom.
c. B and C must be igneous rocks.
d. The sequence of rock layers conforms to the principle of superposition.
Student Responses:
No data yet. The correct response is a.
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).
References and Notes:
The use of ConcepTests and Peer Instruction is discussed in detail on the ConcepTest page.
McConnell, D.A., Steer, D.N. and Owens, K.A., 2003, Assessment and Active Learning Strategies for Introductory Geology Courses, Journal of Geoscience Education, 51(2), 205-216.
McConnell, D.A., Steer et al., 2006, Using Conceptests to Assess and Improve Student Conceptual Understanding in Introductory Courses, Journal of Geoscience Education, (54(1), 61-68.