A Geologic Map, a Stratigraphic Column for the park, a NPS park map, and the corresponding USGS topographic map are all included.
Find out, for example, when dinosaurs ruled the world or when reptiles first appeared. This is a complete reference for students, educators, professional geologists, or anyone interested in geology. This is an easy, quick way to get the names and numerical dates of each of the eons, eras, periods, epochs, and ages.