The Mississippian Period
The Mississippian Period: A Time of Shallow Seas and Marine Marvels The Mississippian Period (approximately 359 to 323 million years ago) represents the first half of the Carboniferous Period in …
The Pennsylvanian Period
The Pennsylvanian Period: The Age of Coal Forests The Pennsylvanian Period (approximately 323 to 299 million years ago) is the latter half of the Carboniferous Period in North America, following …