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 NWâSE 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.