Also known as CEUM locality 42em432v, Eo2, Eolambia II
Where: Emery County, Utah (38.7° N, 111.3° W: paleocoordinates 40.0° N, 73.4° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Mussentuchit Member (Cedar Mountain Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)
• A radiometric age of 98.37 ± 0.07 Ma was obtained by the OMNH from volcanic ash within the Mussentuchit Member (Cifelli and others, 1997, 1999). Additional ages by Garrison and others (2007) ranging from 96.7 ± 0.5 to 98.2 ±0.6 Ma indicate that the Mussentuchit Member was deposited over an interval of 1.5 Ma during the early Cenomanian and supports a correlation with the siliceous marine Mowry Shale to the north, which is well-constrained from 40Ar/39Ar sanidine ages obtained from bentonite beds that bracket the Mowry in Wyoming; the basal Arrow Creek Bentonite is 98.5 ± 0.5 Ma and the capping Clay Spur Bentonite is 97.2 ± 0.7 Ma (Obradovich, 1993; Ogg and Hinnov, 2012; Sprinkel and others, 2012) near the base of the Upper Cretaceous. Tucker et al. 2020 also suggested a likely depositional age of ~96-94Ma for the Musseuntuchit member.
• bed-level stratigraphic resolution
Environment/lithology: lacustrine; volcaniclastic, gray, yellow claystone
Size classes: macrofossils, mesofossils
Preservation: replaced with calcite, replaced with silica, replaced with pyrite
Collection methods: quarrying, surface (in situ), mechanical,
Primary reference: J. H. Bird, D. Burge, and M. Cicconetti. 2002. An analysis of disarticulated juvenile Eolambia bones in the Cedar Mountain Formation of eastern Utah. Journal of Vertebrate Paleontology 22(3 (suppl.)):37A [M. Carrano/M. Carrano]more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 73611: authorized by Matthew Carrano, entered by Matthew Carrano on 21.06.2007, edited by Philip Mannion
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
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Testudinata indet. Oppel 1811 turtle | |
Mammalia | |
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Amphibia | |
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Actinopteri | |
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? Pycnodontidae indet.1 Agassiz 1833 |