Look at your Geologic Time Scale below. You should see that there is a long period of geologic time missing between the Redwall Limestone layer and the layers identified in the previous question. How much time is missing? Which geologic time periods are missing?
a. Cambrian, Ordovician, Silurian
b. Ordovician, Silurian, Devonian
c. Silurian, Devonian, Mississippian
d. Pennsylvanian and Permian