Brigham Young University
Bedforms to Facies to Prediction: Walther's Law and Sequence Stratigraphic Analysis, Blackhawk Formation, Utah part of Cutting Edge:Sedimentary Geology:Activities
This field exercise challenges students to apply their knowledge of bedforms to interpret facies within a vertical section of the Blackhawk Formation, Utah. The students draft a vertical succession of the outcrop identifying key sedimentary structures. Facies are interpreted from their observations and the importance of Walther's Law in predicting facies becomes apparent to them - even to the point of predicting where an economical coal seam may be located within the section. We conclude the exercise by discussing parasequences and challenge them to predict where parasequence boundaries would exist in the outcrop.
Quantitative Analysis vs. Field Estimations: Helping Student to "Make Calls" and Practice Consistent Reporting Techniques when Solving Geological Problems part of Cutting Edge:Sedimentary Geology:Activities
This field exercise challenges students, divided into "teams", to calculate the discharge of an ancient exhumed fluvial channel (Jurassic Morrison Formation). In one aspect of the exercise the students are delighted to discover that they are able to make relatively precise quantitative calculations (based on grain size, bedforms, and water depths). The groups are then asked to report and defend their calculations. The importance of being consistent in choosing variables used to calculate the discharge is discussed (e.g. max., min., etc.).