The San Angelo Formation, Permian of Texas, and Its Vertebrates

  title={The San Angelo Formation, Permian of Texas, and Its Vertebrates},
  author={Everett Claire Olson and James R. Beerbower},
  journal={The Journal of Geology},
  pages={389 - 423}
A vertebrate fauna has been obtained from the San Angelo formation, Permian, of Hardeman and Foard counties, Texas. This formation, which is composed of sandstones, red shales, and conglomerates, is considered to be of earliest middle Permian age. It appears to have been deposited by a series of major streams with three different source areas. The environment of deposition was deltaic, and beds seem to have been laid down under alternating wet and dry conditions. Eight genera of vertebrates, a… 

Vertebrates from the Halgaito tongue of the Cutler Formation, Permian of San Juan County, Utah

The Cutler Formation in San Juan County, Utah, with its alternating units of red beds and light-colored largely eolian sandstones, is ideally suited to the study of Permian terrestrial vertebrate

A global hiatus in the Middle Permian tetrapod fossil record

  • S. Lucas
  • Environmental Science, Geography
  • 2004
For about a half century, most vertebrate paleontologists have correlated the youngest Permian tetrapod assemblages in North America, which are from the San Angelo, Flowerpot and Chickasha formations


Faunal boundaries are by no means absolute and it is the total composition of the faunal complexes and not One or another gen~s or family that is essential to its recogmtion.


Summary The tetrapods from early Carboniferous to early Triassic times comprise the majority of fossil amphibia and the first great development of the reptiles. They are found associated with two

Global Permian tetrapod biostratigraphy and biochronology

  • S. Lucas
  • Geography, Environmental Science
    Geological Society, London, Special Publications
  • 2006
Abstract The most extensive Permian tetrapod (amphibian and reptile) fossil records from the western United States (New Mexico-Texas) and South Africa provide the basis for definition of 10

A Huge Caseid Pelycosaur from North-Western Sardinia and Its Bearing on European Permian Stratigraphy and Palaeobiogeography

Skeletal remains, some loose on the surface and others still embedded, have been recovered from the uppermost part of an outcrop of the Permian Cala del Vino Formation located near Torre del

Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian

It is suggested that the faunal transition represents a genuine event; the lower Permian temperate faunas are more similar to lower PerMian equatorial fauna than middle Permians temperateFaunas.

Trimerorhachis (Amphibia: Temnospondyli) from the Lower Permian of Texas and New Mexico: cranial osteology, taxonomy and biostratigraphy

The morphology and taxonomy of the Early Permian temnospondyl amphibian genus Trimerorhachis are revised, and numerous details of the cranial osteology of T. insignis Cope, 1878 are redescribed.

The Sphenacodontid Synapsid Neosaurus cynodus, and Related Material, from the Permo-Carboniferous of France

Sphenacodontid synapsids were major components of early Permian ecosystems. Despite their abundance in the North American part of Pangaea, they are much rarer in Europe. Among the few described



Correlation of Permian Outcrops on Eastern Side of the West Texas Basin

This paper consists of a correlation and brief description of Permian outcrops of West Texas in an area extending from Cretaceous rocks in Taylor and Nolan counties northward to Red River. Outcrops

Subsurface Cross Section of Permian from Texas to Nebraska

The regional correlations of the lower and middle Permian are illustrated by means of sample logs of twenty wells situated nearly in a straight line from southeastern Irion County, Texas, to Phelps

Permian Word Formation: Its Faunal and Stratigraphic Correlatives, Texas

The Permian Word formation and correlatives are widely distributed in Permian basin areas of Kansas, Oklahoma, Texas, and New Mexico. The formation includes strata that yield diversified assemblages

Correlation of Permian of West Texas and Southeast New Mexico

New evidence regarding the age of the San Andres formation is presented, and it is correlated with the Cherry Canyon formation of the Delaware Mountains, the upper part of the Word formation of the

Climate Through the Ages

Position of San Andres Group West Texas and New Mexico

Stereograms were made of a wide area of the South Permian basin to gain a regional perspective of the upper Permian stratigraphy. Recognized as major structural features are the Val Verde basin, Fort

Remarks on geology of the Concho Country

  • Am. Geologist