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 …
Tag: fossil fuels
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 …