Long Walk Quarry (UMNH 0002) (Cretaceous to of the United States)

Also known as LWQ

Where: Emery County, Utah (39.1° N, 110.9° W: paleocoordinates 39.5° N, 64.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ruby Ranch Member (Cedar Mountain Formation), Aptian to Aptian (125.0 - 100.5 Ma)

• bonebed is 15 m above contact with Morrison Formation

•

•Overall, based on zircon ages and chemostratigraphic studies, the Ruby Ranch Member ranges in age from approximately middle Aptian to middle Albian (about 118 to 105 Ma) for the western Paradox Basin and northern San Rafael Swell. Other radiometric ages indicate the presence of upper Albian strata as well (Chure and others, 2010; Ludvigson and others, 2010a, 2015; Sprinkel and others, 2012)

• bed-level stratigraphic resolution

Environment/lithology: fluvial; lenticular, nodular limestone and calcareous mudstone

• "The nodular limestone may represent a mature calichified surface developed between fluvial channels, though other evidence of pedogenic origin is weak."
• "The bone bed forming the Long Walk Quarry occurs in a nodular limestone layer, approximately 0.6 meters thick, overlain and underlain by softer calcareous mudstones typical of the lower portion of the Cedar Mountain Formation."

Size class: macrofossils

Collection methods: quarrying, mechanical,

Primary reference: F. L. DeCourten. 1991. The Long Walk Quarry and Tracksite: unveiling the mysterious Early Cretaceous of the Dinosaur Triangle region. In W. R. Averett (ed.), Guidebook for Dinosaur Quarries and Tracksites Tour, Western Colorado and Eastern Utah 19-25 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27047: authorized by Matthew Carrano, entered by Matthew Carrano on 14.11.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• The sauropod is described as "Pleurocoelus-like". The theropod teeth are similar to those of Acrocanthosaurus.
Show authors, comments, and common names
Reptilia
 Theropoda -
Allosauroidea indet.2
Allosauroidea indet.2 Currie and Zhao 1994 allosauroid
teeth and postcranial fragments
 Saurischia -
Titanosauriformes indet.1
Titanosauriformes indet.1 Salgado et al. 1997 sauropod
dorsal centra, caudals, partial dentary, teeth, limb and pes elements
1Kirkland et al. 1997; 2Kirkland et al. 2016