In this and the other
pages of this gallery the sources of maps, diagrams and photographic
images have been referenced on that particular illustration. The
Kentucky Geological
Survey is a source of most of the measured sections for Route
23, while many of the maps and diagrams tracking continental
paleogeography were created by Dr.
Ron Blakey of Northern Arizona University at Flagstaff, Arizona;
while the paleogeographic maps and cross sections for the late
Paleozoic of the Appalachians were created by Dr.
Lynn S. Fichter of the Department of Geology/Environmental
Science of James Madison University in Harrisonburg, Virginia.
Most of the photographs are by Christopher Kendall using a digital
Nicon Coolpix camera and a number were taken by Dave Barbeau.