Sedimentology of the lower part of the Upper Triassic Chinle Formation and its relationship to uranium deposits, White Canyon area, southeastern Utah

1983 ◽  
Author(s):  
Russell F. Dubiel
Keyword(s):  
Upper Triassic ◽  
Uranium Deposits ◽  
Chinle Formation

DISTINGUISHING REGURGITALITES AND COPROLITES: A CASE STUDY USING A TRIASSIC BROMALITE WITH SOFT TISSUE OF THE PSEUDOSUCHIAN ARCHOSAUR REVUELTOSAURUS

Palaios ◽  
2020 ◽  
Vol 35 (3) ◽  
pp. 111-121 ◽  
Author(s):  
CALEB M. GORDON ◽  
BRIAN T. ROACH ◽  
WILLIAM G. PARKER ◽  
DEREK E. G. BRIGGS
Keyword(s):  
Soft Tissue ◽  
Bone Mass ◽  
Behavioral Ecology ◽  
Microstructural Analysis ◽  
Upper Triassic ◽  
Extinct Species ◽  
Chinle Formation ◽  
Different Types ◽  
Insight Into

ABSTRACT Regurgitalites (fossilized regurgitates) can provide insight into the behavioral ecology and physiology of extinct species but they are rarely reported because they are difficult to identify and distinguish from coprolites. A compact mass of skeletal material from the Owl Rock Member of the Upper Triassic Chinle Formation of Arizona reveals features that identify it as a regurgitalite. Characteristics of the teeth and osteoderms in the specimen indicate that these remains belong to the pseudosuchian archosaur Revueltosaurus. Chemical and microstructural analysis revealed a dearth of gastric etching, the preservation of muscle fibers, and the absence of a phosphatic matrix, indicating that this bone mass is a regurgitalite and not a coprolite. It was probably produced by a phytosaur, rauisuchid, or temnospondyl, all of which occur in the Owl Rock Member. We offer an identification key to assist in distinguishing between different types of digestive remains produced by vertebrate carnivores.

scholarly journals The Pangaean Megamonsoon: Evidence from the Upper Triassic Chinle Formation, Colorado Plateau

Palaios ◽  
1991 ◽  
Vol 6 (4) ◽  
pp. 347 ◽  
Author(s):  
Russell F. Dubiel ◽  
Judith Totman Parrish ◽  
J. Michael Parrish ◽  
Steven C. Good
Keyword(s):  
Colorado Plateau ◽  
Upper Triassic ◽  
Chinle Formation

scholarly journals Osteology of the Late Triassic aetosaur Scutarx deltatylus (Archosauria: Pseudosuchia)

2016 ◽  
Author(s):  
William G Parker
Keyword(s):  
National Park ◽  
Vertebral Column ◽  
Upper Triassic ◽  
Late Triassic ◽  
Chinle Formation ◽  
Petrified Forest National Park ◽  
Petrified Forest

Aetosaurs are some of the most common fossils collected from the Upper Triassic Chinle Formation of Arizona, especially at the Petrified Forest National Park. Four partial skeletons collected from the park from 2002 through 2009 represent the holotype and referred specimens of Scutarx deltatylus. These specimens include much of the carapace, as well as the vertebral column, and shoulder and pelvic girldles. A partial skull represents the first aetosaur skull recovered from Arizona since the 1930s. Scutarx deltatylus can be distinguished from closely related forms Calyptosuchus wellesi and Adamanasuchus eisenhardtae not only morphologically, but also stratigraphically. Thus, Scutarx deltatylus is potentially an index taxon for the upper part of the Adamanian biozone.

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