Micropaleontologic and lithologic data obtained from several exposures of Finlay, Duck Creek and Fort Worth equivalents are recorded for comparison with similar information from other areas. Biostratigraphic and paleoecologlcal ...

Carbon and oxygen isotopes were analyzed to identify the process of algal symbiosis in Pennslyvanian rugose corals from the Graham Formation of north-central Texas. Because original oxygen and carbon isotopic compositions ...

Study of the bryozoan fauna of the Ordovician Maravilllas Formation in trans-Pecos Texas indicates that the major portion of the formation is of Richmondian age. Exact correlation with the type Ordovician section appears ...

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The mid-crustal xenoliths from Potrillo maar record a petrologic and geochemical history that has until now been unknown from the Potrillo volcanic field. The igneous and meta-igneous xenoliths are samples of one or more ...

Continental deposits of the Upper Triassic Dockum Group are exposed along the eastern escarpment of the Southern High Plains in northwestern Texas. Three formations are present: the Tecovas, the Trujillo, and the Chinle, ...

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Gastropods are often the only fossils found in late Cenozoic sediments on the Southern High Plains. By virtue of their conservatism and low rate of mobility, gastropods should be sensitive indicators of their environment, ...

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