It is the writer’s purpose in this work to describe in detail the Carboniferous deposits of the Appalachian basin, to correlate them, to ascertain as far as possible the conditions existing during the deposition of the various rock masses, and finally to apply the facts in a discussion of the origin of coal and coal beds.

Appalachian basin, as here used, refers to the area bounded at the east by the old Appalachian land, at the west by the Cincinnati uplift to central Kentucky, and thence southward to Alabama by the area whence erosion has removed the newer rocks and thereby separated the eastern from the western Carboniferous region. In a general way, it includes Pennsylvania, Maryland, and Virginia west from the Blue ridge, the whole of West Virginia, eastern Ohio and Kentucky, east-central Tennessee and northern Alabama. In Alabama the Appalachian and Mississippi areas are continuous; in Tennessee . . .

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