FIGURE 9. Dinosaur footprint in the South Platte Formation of the Dakota Group at Alameda Parkway near Morrison. Print is about 44 cm long front to back. Sharp claw marks indicate a carnivorous dinosaur; it was walking on its toes, leaving no heel print. May 1968.
Interpretive isopach and paleotectonic maps of Pennsylvanian System. 16. Maps showing total thickness of coal and number of coal beds in the Pennsylvanian of the Eastern United States. 17. Maps showing environmental interpretation of stratigraphic units in the Liverpool cyclothem of the Illinois basin and equivalent units in the eastern midcontinent region.
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