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Nocona Formation
Figure 1 —Lithostratigraphy and location of Lower Permian pygocephalomorph...
—Log/log cross plot of sandstone body width vs. thickness (modified after ...
Rogers Pool, Montague County, Texas: GEOLOGICAL NOTES
Geographic and maximal stratigraphic distribution of Bolosauridae. Top : g...
Developments in North-Central and West-Central Texas, 1938
Bonita Discovery, Montague County, Texas
Developments in North Texas in 1950
Earth Temperatures of North-Central Texas
NEW DEVELOPMENTS IN NORTH AND WEST-CENTRAL TEXAS, 1940
Developments in North and West-Central Texas in 1945
First evidence of a bolosaurid parareptile in France (latest Carboniferous-earliest Permian of the Autun basin) and the spatiotemporal distribution of the Bolosauridae
CRUSTACEAN-BEARING CONTINENTAL DEPOSITS IN THE PETROLIA FORMATION (LEONARDIAN SERIES, LOWER PERMIAN) OF NORTH-CENTRAL TEXAS
Abstract A revised amphibian zonation for the European Pennsylvanian and Cisuralian (Upper Carboniferous to Lower Permian) with nine amphibian zones is presented. The index fossils belong to species-chronoclines with two or three closely related species. The time resolution of these amphibian zones is about 1.5–3.0 Ma. Biostratigraphical correlations with amphibian zones are applicable to 16 basins in the Czech Republic, Poland, France, Italy and Germany. The biostratigraphical potential of other tetrapods is discussed.
Developments in North and West-Central Texas in 1942
A new species of Dimetrodon (Synapsida: Sphenacodontidae) from the Lower Permian of Germany records first occurrence of genus outside of North America
Developments in North and West-Central Texas, 1939
Walk, Wade, or Swim? Vertebrate Traces on an Early Permian Lakeshore
Developments in North and West-Central Texas in 1944
THE POSTCRANIAL SKELETON OF TRIMERORHACHIS INSIGNIS COPE, 1878 (TEMNOSPONDYLI: TRIMERORHACHIDAE): A PLESIOMORPHIC TEMNOSPONDYL FROM THE LOWER PERMIAN OF NORTH AMERICA
Diverse wetland vegetation flourished at the margins of the Midland Basin in north-central Texas during the Pennsylvanian Period. Extensive coastal swamps and an ever-wet, tropical climate supported lush growth of pteridosperm, marattialean fern, lycopsid, and calamite trees, and a wide array of ground cover and vines. As the Pennsylvanian passed into the Permian, the climate of the area became drier and more seasonal, the great swamps disappeared regionally, and aridity spread. The climatic inferences are based on changes in sedimentary patterns and paleosols as well as the general paleobotanical trends. The lithological patterns include a change from a diverse array of paleosols, including Histosols (ever-wet waterlogged soils), in the late Pennsylvanian to greatly diminished paleosol diversity with poorly developed Vertisols by the Early–Middle Permian transition. In addition, coal seams were present with wide areal distribution in the late Pennsylvanian whereas beds of evaporates were common by the end of the Early Permian. During this climatic transition, wetland plants were confined to shrinking “wet spots” found along permanent streams where the vegetation they constituted remained distinct if increasingly depauperate in terms of species richness. By Leonardian (late Early Permian) time, most of the landscape was dominated by plants adapted to seasonal drought and a deep water table. Wetland elements were reduced to scattered pockets, dominated primarily by weedy forms and riparian specialists tolerant of flooding and burial. By the Middle Permian, even these small wetland pockets had disappeared from the region.