Part 7/11:
The gradual separation of Pangaea resulted in the formation of what would become the Atlantic Ocean, with North America's Eastern margin transitioning to a passive state where it now flows smoothly from continental to oceanic crust.
Geological Composition of the Appalachians
The geological makeup of the Appalachian Mountains is as diverse as its history. Possible rock formations vary from sedimentary rocks, such as limestone and sandstone, to more metamorphic types, like schist, gneiss, and quartzite.