Biostratigraphy of the Crystal Peak Dolomite, Ibex, UT
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 page first made public: Jun 19, 2009
It is part of a flexible field course
Prior student experience varies widely in this course.
Skills and concepts that students must have mastered
How the activity is situated in the course
Content/concepts goals for this activity
Section measuring techniques
Sample collection and hygeine for micro paleontology
Higher order thinking skills goals for this activity
Other skills goals for this activity
use of jacob staff
Drawing a stratigraphic section in the field
Description of the activity/assignment
PreparationMuch of the preparation for this activity could be done before the fieldtrip began.
First, the stratigraphy and biostratigraphy of the Ibex region is well known and a pre-lecture with handouts were provided by James Miller, one of the co-researchers who specializes in Conodont stratigraphy of the region.
Other helpful steps in preparation would include providing students with an orientation to conodonts, including a little time examining them under a microscope and studying photographs of key species expected in the section. In this case, the species that might mark the base of the Mohawkian.
Pre-trip Activity (spring 2009)
Students can be provided with an opportunity to contribute to sampling strategy. In this case, some samples had already been collected (labelled A, B, C . . . without the context of a measured section), and conodonts had already been identified from these samples (by Ray Ethington). Provide the students with this information, combined with knowledge of the specific biostratigraphy in question. At this point, allow students to choose the interval of interest–where do we need to collect more samples? Where would additional samples likely NOT improve the precision of correlation? Why?
Field Activity (Spring 2009 after finals)
With this introduction, students were presented at the outcrop section. Students were divided into three groups and took turns 1) using Jacob staff to measure the strata and place marks at regular intervals up outcrop; 2) drafting a stratigraphic section and describing the strata in a field notebook; and 3) recording the stratigraphic horizons of previously-collected samples, and collecting additional samples according to plan. Each of these activities is closely monitored by an instructor, so it requires three instructors to complete.
Followup Activities (spring 2010 Sed Strat course).This activity was conducted as part of a two-week field excursion in the spring of 2009. Grades were due at the end of the two weeks, so followup activities were not incorporated into the course. However, many of the students who attended this field course are geology majors who will take sedimentology-stratigraphy course (tought by ME the same instructor) in the spring of 2010. This will provide an opportunity for students to take combine their field observations and photos with conodont data extracted from the samples that they collected and perhaps participate directly in the publication process.
The fact that this was a real research project elicited a high level of enthusiasm from the students.
Determining whether students have met the goals
Download teaching materials and tips
- Activity Description/Assignment:Activity description for Crystal Peak/Ibex Stratigraphy (Acrobat (PDF) 62kB Jun19 09)
- Instructors Notes:
- Solution Set: