Estimating Valley Fill Thickness with a Gravity Survey
This activity has benefited from input from faculty educators beyond the author through a review and suggestion process.
This review took place as a part of a faculty professional development workshop where groups of faculty reviewed each others' activities and offered feedback and ideas for improvements. To learn more about the process On the Cutting Edge uses for activity review, see http://serc.carleton.edu/NAGTWorkshops/review.html.
This activity was selected for the On the Cutting Edge Reviewed Teaching Collection
This activity has received positive reviews in a peer review process involving five review categories. The five categories included in the process are
- Scientific Accuracy
- Alignment of Learning Goals, Activities, and Assessments
- Pedagogic Effectiveness
- Robustness (usability and dependability of all components)
- Completeness of the ActivitySheet web page
For more information about the peer review process itself, please see http://serc.carleton.edu/NAGTWorkshops/review.html.
This page first made public: Jul 12, 2007
Designed for a geophysics course
Integrates geophysics into a core course in geology
Skills and concepts that students must have mastered
How the activity is situated in the course
Content/concepts goals for this activity
Higher order thinking skills goals for this activity
Other skills goals for this activity
Description of the activity/assignment
Previous mapping exercises have dealt with well-exposed rocks, but this particular area runs into a problem with a thick valley fill on bedrock. We have some good estimates of the density contrast for the valley fill and bedrock. A prelab exercise asks the students to assign realistic densities to the units. In class we develop a model for the expected anomaly size for different thickness, then we go out and measure the anomaly and estimate the thickness.
Uses online and/or real-time data Has minimal/no quantitative component
Addresses student fear of quantitative aspect and/or inadequate quantitative skills
Uses geophysics to solve problems in other fields
Determining whether students have met the goals
Download teaching materials and tips
- Activity Description/Assignment (Acrobat (PDF) 304kB Jul12 07)
- Solution Set (Acrobat (PDF) 37kB Jul12 07)