Eustatic Control on Alluvial Sequence Stratigraphy: A Possible Example from the Cretaceous-Tertiary Transition of the Tornillo Basin, Big Bend National Park, West Texas, U.S.A.

2004 ◽  
Vol 74 (3) ◽  
pp. 391-404 ◽  
Author(s):  
S. C. Atchley ◽  
L. C. Nordt ◽  
S. I. Dworkin
Keyword(s):  
Sequence Stratigraphy ◽  
National Park ◽  
Big Bend National Park ◽  
West Texas ◽  
Big Bend

Revised age constraints for Late Cretaceous to early Paleocene terrestrial strata from the Dawson Creek section, Big Bend National Park, west Texas

2018 ◽  
Vol 130 (7-8) ◽  
pp. 1143-1163 ◽  
Author(s):  
Caitlin E. Leslie ◽  
Daniel J. Peppe ◽  
Thomas E. Williamson ◽  
Matthew Heizler ◽  
Mike Jackson ◽  
...  
Keyword(s):  
Late Cretaceous ◽  
National Park ◽  
Big Bend National Park ◽  
West Texas ◽  
Big Bend ◽  
Early Paleocene ◽  
Age Constraints

Fire regimes of the piñon–juniper woodlands of Big Bend National Park and the Davis Mountains, west Texas, USA

2009 ◽  
Vol 39 (6) ◽  
pp. 1236-1246 ◽  
Author(s):  
H.M. Poulos ◽  
R.G. Gatewood ◽  
A.E. Camp
Keyword(s):  
National Park ◽  
Fire Regime ◽  
Fire Regimes ◽  
Climatic Conditions ◽  
Tree Regeneration ◽  
Big Bend National Park ◽  
Fire Scar ◽  
West Texas ◽  
Big Bend ◽  
Davis Mountains

While piñon woodlands cover much of arid North America, surprisingly little is known about the role of fire in maintaining piñon forest structure and species composition. The lack of region-specific fire regime data for piñon–juniper woodlands presents a roadblock to managers striving to implement process-based management. This study characterized piñon–juniper fire regimes and forest stand dynamics in Big Bend National Park (BIBE) and the Davis Mountains Preserve of the Nature Conservancy (DMTNC) in west Texas. Mean fire return intervals were 36.5 and 11.2 years for BIBE and DMTNC, respectively. Point fire return intervals were 150 years at BIBE and 75 years at DMTNC. Tree regeneration in west Texas piñon–juniper woodlands occurred historically during favorable climatic conditions following fire years. The presence of multiple fire scars on our fire-scar samples and the multicohort stands of piñon suggested that low intensity fires were common. This study represents one of the few fire-scar-based fire regime studies for piñon–juniper woodlands. Our results differ from other studies in less topographically dissected landscapes that have identified stand-replacing fire as the dominant fire regime for piñon–juniper woodlands. This suggests that mixed-severity fire regimes are typical across southwestern piñon forests, and that topography is an important influence on fire frequency and intensity.

Tyrannosauroid dinosaurs from the Aguja Formation (Upper Cretaceous) of Big Bend National Park, Texas

2012 ◽  
Vol 103 (3-4) ◽  
pp. 471-485 ◽  
Author(s):  
Thomas M. Lehman ◽  
Steven L. Wick
Keyword(s):  
National Park ◽  
Upper Cretaceous ◽  
Frontal Bone ◽  
Adult Size ◽  
Unique Combination ◽  
Big Bend National Park ◽  
West Texas ◽  
Big Bend ◽  
Large Predators ◽  
Sagittal Crest

ABSTRACTRare remains of tyrannosauroid dinosaurs from the Aguja Formation in West Texas indicate the presence here of a relatively gracile species, comparable in form and adult size to Appalachiosaurus or subadult albertosaurines, Gorgosaurus and Albertosaurus. Histologic analysis of one of the specimens indicates that the Aguja tyrannosaur attained an adult size substantially smaller than adult albertosaurines (700 kg, 6·5 m body length). The frontal bone is narrow with a wide orbital slot and a bipartite joint for the postorbital, features thought to be diagnostic of Albertosaurinae; but there is a tall sagittal crest and reduced parietal wedge separating the frontals on the midline, features thought to be diagnostic of Tyrannosaurinae. The tall sagittal crest may be a synapomorphy of Tyrannosaurinae, and the Aguja tyrannosaur is herein referred to that clade. However, the unique combination of character states exhibited by the frontal prevents confident attribution to any known species. The Aguja tyrannosaur provides further evidence that North American Campanian tyrannosauroids were remarkably diverse for such large predators, and that each species was apparently endemic to a relatively small geographic province.

Hadrosaurian dinosaurs from the Maastrichtian Javelina Formation, Big Bend National Park, Texas

2016 ◽  
Vol 90 (2) ◽  
pp. 333-356 ◽  
Author(s):  
Thomas M. Lehman ◽  
Steven L. Wick ◽  
Jonathan R. Wagner
Keyword(s):  
New Species ◽  
Great Plains ◽  
National Park ◽  
Northern Great Plains ◽  
Single Specimen ◽  
Big Bend National Park ◽  
West Texas ◽  
Big Bend ◽  
A New Species ◽  
Specific Identity

AbstractRare remains of hadrosaurian dinosaurs previously reported from the Maastrichtian Javelina Formation of West Texas had been attributed tentatively to either Edmontosaurus or Kritosaurus. Three recently recovered specimens include substantial skull parts and postcranial skeletal elements sufficient to recognize three distinct hadrosaurs. Two species are found in the lower part of the Javelina Formation; one of these is identified as Kritosaurus sp., confirming the earlier referral of specimens to this taxon. The most complete of these specimens combines features thought to be diagnostic of both K. navajovius Brown, 1910 and ‘Naashoibitosaurus’ ostromi Hunt and Lucas, 1993 and exhibits some unique attributes such that its specific identity remains uncertain. A second species, documented by a single specimen found near the base of the Javelina Formation, is inadequate to confidently identify but appears to represent a ‘solid-crested’ saurolophine with frontals having upturned processes along the midline, similar to those that brace the posterior side of the narial crest in Saurolophus. A third hadrosaur is represented at a bonebed in the uppermost part of the Javelina Formation. Its remains are sufficient to justify designation as a new species ?Gryposaurus alsatei. The skull roof elements are similar to those in species of Gryposaurus, and although no parts of the narial crest are preserved, the bordering elements indicate that ?G. alsatei was a ‘flat-headed’ saurolophine. Referral of ?G. alsatei to Gryposaurus would constitute a significant temporal range extension for the genus into late Maastrichtian time, and if correct, this long-lived lineage of hadrosaurs persisted nearly to the end of Cretaceous time in West Texas. ?G. alsatei was a contemporary of Edmontosaurus, the sole terminal Cretaceous hadrosaur in the northern Great Plains region, and neither possessed the ornate narial crest that characterized many earlier hadrosaurs.

The gray vireo (Vireo vicinior Coues; Aves: Vireonidae) wintering in the Big Bend region, west Texas

1971 ◽  
Vol 49 (6) ◽  
pp. 953-955
Author(s):  
Jon C. Barlow ◽  
Roland H. Wauer
Keyword(s):  
National Park ◽  
Wintering Grounds ◽  
Big Bend National Park ◽  
West Texas ◽  
Big Bend ◽  
Northwestern Mexico ◽  
Big Bend Region

The gray vireo, which was previously known only to winter in southwestern Arizona and northwestern Mexico, is reported as wintering in small numbers in Big Bend National Park, west Texas. This area is 450 mi east of the previously known wintering grounds.

Sign in / Sign up

Export Citation Format

Share Document