The permocarboniferous flora of north central Texas.
Roberts, David C
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The Permocarboniferous flora of north central Texas has not been studied as a whole, to my knowledge, although a few papers have been written about the plants in the area. Therefore, this thesis has been written, to describe the flora as a whole, and to indicate its spatial and temporal relationships and significance. The area from which the fossil flora comes comprises portions of Archer, Baylor, Clay, Throckmorton, Wichita, and Young Counties. Stratigraphically, it contains one formation from the Pennsylvanian Period, and six from the Lower Permian; the former is the Harpersville, and the latter are the Pueblo, Moran, Putnam, .Admiral, . Belle Plains, and Clyde. Up to the top of the Harpersville formation, the deposits are mostly marine, broken here and there by lenses of coal, which represent short recessions of the epicontinental sea which was present at the time. At the top of the Harpersville formation is a conglomerate layer which create a disconformity, and above it, the deposits are predominately fluviatile. Thus, the sea had moved to the west, but occasional limestones mark short reinvasions of the area. The disconformity at the top of the Harpersville is the boundary between the Pennsylvanian and Permian periods in north central Texas. [TRUNCATED]
Thesis (M.A.)--Boston University