Just Past Celeste's Microsite (JPC) (Cretaceous of the United States)

Where: Garfield County, Montana (47.6° N, 106.9° W: paleocoordinates 54.5° N, 79.4° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• lower part of formation

• bed-level stratigraphic resolution

Environment/lithology: channel lag; tabular, medium-grained, concretionary, ferruginous, intraclastic sandstone

• "bioclast accumulation in a basal channel lag."
• "a medium-grained sanstone that fines upward. The fossil horizon is underlain by a clay-domminated mudstone and is capped by a medium-grained sandstone unit. Mudstone clasts, iron concretions, vertebrate fossils, and well-rounded, pebble-sized bone fragments are interbedded within the 40-cm-thick fossil-bearing sandstone. Shell hash is found throughout the unit." Unit is massive.

Size class: mesofossils

Reposited in the UCM

Collection methods: bulk, quarrying, sieve,

Primary reference: L. E. Wilson. 2008. Comparative taphonomy and paleoecological reconstruction of two microvertebrate accumulations from the Late Cretaceous Hell Creek Formation (Maastrichtian), eastern Montana. Palaios 23:289-297 [M. Carrano/M. Carrano]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 85499: authorized by Matthew Carrano, entered by Matthew Carrano on 02.01.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• "shell hash" not included in taxonomic list
Actinopteri
 Acipenseriformes - Acipenseridae
Acipenser sp. Linnaeus 1758 sturgeon
 Holostei -
Holostei "indet. A" Müller 1846
Holostei "indet. B" Müller 1846
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
Osteichthyes
 Proteida - Batrachosauroididae
Prodesmodon copei Estes 1964 salamander
Opisthotriton kayi Auffenberg 1961 salamander
 Caudata - Urodela
Habrosaurus dilatus Gilmore 1928 siren
Scapherpeton tectum Cope 1876 salamander
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Testudines - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Adocidae
Adocus sp. Cope 1868 turtle
 Testudines - Panchelydridae
 Avetheropoda - Dromaeosauridae
Richardoestesia isosceles Sankey 2001 coelurosaur
Dromaeosaurus albertensis Matthew and Brown 1922 coelurosaur
 Avetheropoda -
Paronychodon lacustris Cope 1876 coelurosaur
 Avetheropoda - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
 Ornithischia - Ankylosauridae
Ankylosauridae indet. Brown 1908 ornithischian
 Neornithischia - Pachycephalosauridae
Pachycephalosauridae indet. Sternberg 1945 ornithischian
 Neornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Neornithischia - Thescelosauridae
cf. Thescelosaurus sp. Gilmore 1913 ornithischian
 Neornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Eosuchia -
Mammalia
 Multituberculata - Cimolomyidae
Meniscoessus sp. Cope 1882 multituberculate
Cimolomys sp. Marsh 1889 multituberculate
 Multituberculata - Neoplagiaulacidae
Mesodma sp. Jepsen 1940 multituberculate
 Multituberculata - Cimolodontidae
Cimolodon sp. Marsh 1889 multituberculate