scholarly journals Unevaluated preliminary geologic cross section of uranium-bearing upper Triassic rocks extending from Ute Reservoir, New Mexico, to Palo Duro Canyon, Texas

1976 ◽  
Author(s):  
Warren Irvin Finch ◽  
J.C. Wright ◽  
Beth O. Davis
Keyword(s):  
New Mexico ◽  
Cross Section ◽  
Upper Triassic

scholarly journals A thin-shelled reptile from the Late Triassic of North America and the origin of the turtle shell

2008 ◽  
Vol 276 (1656) ◽  
pp. 507-513 ◽  
Author(s):  
Walter G Joyce ◽  
Spencer G Lucas ◽  
Torsten M Scheyer ◽  
Andrew B Heckert ◽  
Adrian P Hunt
Keyword(s):  
New Mexico ◽  
North America ◽  
Fossil Record ◽  
De Novo ◽  
Upper Triassic ◽  
Late Triassic ◽  
Terrestrial Habitat ◽  
Turtle Shell ◽  
Shell Elements ◽  
Stem Lineage

A new, thin-shelled fossil from the Upper Triassic (Revueltian: Norian) Chinle Group of New Mexico, Chinlechelys tenertesta , is one of the most primitive known unambiguous members of the turtle stem lineage. The thin-shelled nature of the new turtle combined with its likely terrestrial habitat preference hint at taphonomic filters that basal turtles had to overcome before entering the fossil record. Chinlechelys tenertesta possesses neck spines formed by multiple osteoderms, indicating that the earliest known turtles were covered with rows of dermal armour. More importantly, the primitive, vertically oriented dorsal ribs of the new turtle are only poorly associated with the overlying costal bones, indicating that these two structures are independent ossifications in basal turtles. These novel observations lend support to the hypothesis that the turtle shell was originally a complex composite in which dermal armour fused with the endoskeletal ribs and vertebrae of an ancestral lineage instead of forming de novo. The critical shell elements (i.e. costals and neurals) are thus not simple outgrowths of the bone of the endoskeletal elements as has been hypothesized from some embryological observations.

Another tyrannosaurid dinosaur from the Cretaceous of Northwest New Mexico

1992 ◽  
Vol 66 (4) ◽  
pp. 690-691 ◽  
Author(s):  
Brad Archer ◽  
John P. Babiarz
Keyword(s):  
New Mexico ◽  
Cross Section ◽  
Upper Cretaceous ◽  
State University ◽  
Arizona State University ◽  
Skeletal Material

In the November 1990 (Vol. 64, no. 6) issue of the Journal of Paleontology, Lehman and Carpenter described an Aublysodon, which at the time was believed to be the most complete Carnosaur known from the Upper Cretaceous Kirtland Shale of northwestern New Mexico. Recently, a more complete specimen, considered to be a tyrannosaurid dinosaur on the basis of a proximally constricted third metatarsal and a partial D-shaped (in cross section) premaxillary tooth (Molnar, 1990), has been brought to the attention of the Museum of Geology at Arizona State University by an amateur paleontologist who recognized its scientific importance after obtaining it from an individual in New Mexico. The remains of this dinosaur, collected in northwestern New Mexico sometime in late 1989 or early 1990 by unknown persons, include both cranial and skeletal material (Figure 1.1).

Specimen Preparation for Cross-Section Atom Probe Analysis

2008 ◽  
Vol 14 (S2) ◽  
pp. 1004-1005 ◽  
Author(s):  
D Lawrence ◽  
R Alvis ◽  
D Olson
Keyword(s):  
New Mexico ◽  
Cross Section ◽  
Atom Probe ◽  
Specimen Preparation ◽  
Probe Analysis ◽  
Atom Probe Analysis

Extended abstract of a paper presented at Microscopy and Microanalysis 2008 in Albuquerque, New Mexico, USA, August 3 – August 7, 2008

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