THE STRUCTURAL GEOLOGY MAPPING CHALLENGE: AN EVOLVING TOOL FOR ONLINE GEOSCIENCE EDUCATION
The challenge for students in our current version is to estimate bedding at several points around a fold in Big Horn Basin, WY. Student estimates of strike and dip are auto-scored by the computer, which calculates the cross-product of the poles to student and instructor bedding planes. Students are awarded medallions based on closeness of these estimates. After fitting bedding planes, students fit a great circle through the poles to bedding in order to determine the fold axis and they fit a plane to hinge points of successive beds to pin down the axial plane. Finally, students can fit bézier curves to periclinal fold cross sections and long sections. This is important to teach the lesson that inclined folds do not plunge uniformly forever. Guerrilla testing is scheduled for Spring 2015 and initial results will be reported.