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GEOREF RECORD

Depositional constraints on the Lower Cretaceous Stikes Quarry dinosaur site; upper Yellow Cat Member, Cedar Mountain Formation, Utah

James I. Kirkland, Edward L. Simpson, Donald D. Deblieux, Scott K. Madsen, Emily Bogner and Neil E. Tibert
Depositional constraints on the Lower Cretaceous Stikes Quarry dinosaur site; upper Yellow Cat Member, Cedar Mountain Formation, Utah
Palaios (September 2016) 31 (9): 421-439

Abstract

A new mass death assemblage in Lower Cretaceous strata of east-central Utah contains well-preserved skeletons representing an ontogenetic series of individuals of Utahraptor, and at minimum two iguanodont grade ornithischian skeletons. The dinosaurs were entombed in ovoid-lensoidal, fine-grained sandstone sills linked by sandstone pipes and/or dikes and another basal lensoidal mass with scattered and broken iguanodont and sauropod bones and to an underlying gravelly sandstone bed. Exposed in the excavation high-walls are syndepositional normal-faults bounding graded ripple strata. Multiphased fluid over-pressurization in an artesian setting creating the structures. Trapping, killing, and subsequent burial mechanism was generated by variations of pressure in a localized artesian spring system that breached the surface and is the first such mechanism documented with numerous dinosaur victims.


ISSN: 0883-1351
Serial Title: Palaios
Serial Volume: 31
Serial Issue: 9
Title: Depositional constraints on the Lower Cretaceous Stikes Quarry dinosaur site; upper Yellow Cat Member, Cedar Mountain Formation, Utah
Affiliation: Utah Geological Survey, Salt Lake City, UT, United States
Pages: 421-439
Published: 201609
Text Language: English
Publisher: Society for Sedimentary Geology, Tulsa, OK, United States
References: 149
Accession Number: 2016-085329
Categories: Vertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sect., strat. col., geol. sketch map
N38°55'00" - N38°55'00", W109°34'60" - W109°34'60"
Secondary Affiliation: Kutztown University of Pennsylvania, USA, United StatesUniversity of Mary Washington, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by SEPM (Society for Sedimentary Geology), Tulsa, OK, United States
Update Code: 201641
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