Projected profiles of the Jurassic peneplain north of the outcrop of the Trinity sandstone in Oklahoma and Arkansas are combined with subsurface measurements of the base of the Trinity sandstone, and maps are drawn. The present slope of this peneplain and its major flexures are illustrated.

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First page of THE DEPTH OF THE BASE OF THE TRINITY SANDSTONE AND THE PRESENT ATTITUDE OF THE JURASSIC PENEPLAIN IN SOUTHERN OKLAHOMA AND SOUTHWESTERN ARKANSAS<xref ref-type="fn" rid="fn1"><sup>1</sup></xref>
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