Biostratigraphic and Lithostratigraphic Correlation of Sedimentary Strata in the Atlantic Coastal Plain
Summary
In this laboratory exercise students work in groups to create a fence diagram cross section of the Atlantic Coastal Plain by correlating a sequence of well logs recorded along a NW–SE transect through coastal North Carolina.
Context
Audience
I have used this exercise in Introduction to Historical Geology, Invertebrate Paleontology, and Sedimentology-Stratigraphy courses for undergraduates.
Skills and concepts that students must have mastered
Some knowledge of fossils, geological time, unconformities, and correlation is needed and can be introduced prior to doing the exercise.
How the activity is situated in the course
Stand alone exercise designed to introduce students to different methods of correlation and different types of chronostratigraphic markers.
Goals
Content/concepts goals for this activity
Correlation - lithostratigraphic, chronostratigraphic, and biostratigraphic, index fossils.
Unconformities - disconformity and angular unconformity
Deposition, transgression and regression, subsidence
Unconformities - disconformity and angular unconformity
Deposition, transgression and regression, subsidence
Higher order thinking skills goals for this activity
Basic interpretation of stratigraphic patterns in both time and space.
Basic calculation and graphing of subsidence rates.
Basic calculation and graphing of subsidence rates.
Other skills goals for this activity
Working in groups.
Following detailed instructions.
Following detailed instructions.
Description of the activity/assignment
In this laboratory exercise students create a fence diagram cross section of the Atlantic Coastal Plain by correlating a sequence of well logs recorded along a NW–SE transect through coastal North Carolina. The well logs in this exercise are based on actual well logs published by the United States Geological Survey, providing a realistic cross section of the Atlantic Coastal Plain when the exercise is completed. Students must make intelligent decisions as to how best to draw lithostratigraphic correlations between well logs, guided by information provided by biostratigraphic correlations. After completing this lab, students should have a better understanding of how strata are deposited in time and space under the control of transgressions and regressions, how geologists correlate strata, and they should be able to recognize disconformities and angular unconformities in cross sections.
Determining whether students have met the goals
Students are observed in group work and individual lab reports with responses to questions posed in the lab are assessed and graded.
More information about assessment tools and techniques.Teaching materials and tips
- Activity Description/Assignment:Laboratory - Biostratigraphic and Lithostratigraphic Correlation of Sedimentary Strata in the Atlantic Coastal Plain (Acrobat (PDF) 1.1MB Aug2 09)
- Instructors Notes:
- Solution Set:Key - Biostratigraphic and Lithostratigraphic Correlation of Sedimentary Strata in the Atlantic Coastal Plain (Acrobat (PDF) 510kB Jun4 09)
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Other Materials
- Lab - Biostratigraphic and Lithostratigraphic Correlation of Sedimentary Strata in the Atlantic Coastal Plain (Microsoft Word 1.2MB Aug2 09)