Jack's Birthday Site, MOR TM-068 (bone layer) (Cretaceous of the United States)

Also known as ETE Locality 1564

Where: Glacier County, Montana (48.6° N, 113.8° W: paleocoordinates 56.5° N, 79.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Two Medicine Formation (Montana Group), Campanian (83.6 - 72.1 Ma)

• ETE dating method: absolute, ETE age comment: frm bentonites radiometric intage_max, radiometric intage_min

•Foreman et al. 2008: 40Ar/39Ar radioisotopic age data reported for the Two Medicine Formation (Rogers et al., 1993; present study) are consistent with the unit accumulating during most of the Campanian Stage (83.5–70.6 Ma, Gradstein et al., 2004), with deposition definitively commencing prior to 80 Ma and terminating shortly after 74 Ma.

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; silty mudstone

• ETE sed env 1: lacustrine, ETE sed env 2: floodplain ETE env comment: drought - "lake shoreline"
• ETE rock type adj: silty

Size classes: macrofossils, mesofossils

Collection methods: quarrying, mechanical,

• ETE reference list: 478, 483, 81

•Includes coprolites.

Primary reference: D. J. Varricchio. 1992. Taphonomy and histology of the Upper Cretaceous theropod dinosaur Troodon formosus: life history implications. Journal of Vertebrate Paleontology 12(3, suppl.):57A [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 22689: authorized by Anna Behrensmeyer, entered by Anna Behrensmeyer on 29.05.2001, edited by Victoria Egerton and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Pinopsida
 Pinales - Taxodiaceae
Taxodiaceae indet.5 Saporta 1865
unclassified
  -
Charophyta indet.5 Migula 1890
Gastropoda
  -
Gastropoda indet.5 Cuvier 1795 snail
 Cerithioidea - Pleuroceridae
Pleuroceridae indet.5 Thiele 1929 snail
 Architaenioglossa - Viviparidae
 Heterostropha - Physidae
Bivalvia
 Cardiida - Sphaeriidae
Sphaerium sp.5 Scopoli 1777 fingernail clam
 Unionida - Unionidae
Unionidae indet.5 Rafinesque 1820 freshwater mussel
Deuteropoda
  -
Ostracoda indet.5 Latreille 1802 ostracod
Gnathostomata
  -
Amphibia
  -
Amphibia indet.5 Linnaeus 1758 tetrapod
Mammalia
  -
Mammalia indet.5 Linnaeus 1758 mammal
Reptilia
 Testudines - Chelydridae
Chelydridae indet.5 Swainson 1839 turtle
 Testudines - Nanhsiungchelyidae
Basilemys sp.5 Hay 1902 turtle
 Testudines -
"Chelonia indet." = Testudines5
"Chelonia indet." = Testudines5 Batsch 1788 turtle
 Squamata -
Squamata indet.5 squamates
 Loricata -
Crocodylia indet.5 crocodilian
 Dinosauria -
 Ornithischia -
Ceratopsia indet.5 ceratopsian
 Ornithischia - Hypsilophodontidae
Hypsilophodontidae indet.3 hypsilophodontid
 Ornithischia - Hadrosauridae
Hadrosauridae indet.5 Cope 1869 hadrosaurid
Hadrosaurinae indet.3 Lambe 1918 hadrosaurine
Gryposaurus sp.4 Lambe 1914 hadrosaurine
"Prosaurolophus blackfeetensis" = Prosaurolophus maximus4 Brown 1916 hadrosaurine
ETE occurrence; species: .
Lambeosaurinae indet.3 Parks 1923 lambeosaurine
Hypacrosaurus cf. stebingeri3 Horner and Currie 1994 lambeosaurine
 Theropoda -
 Theropoda - Troodontidae
Troodon formosus4 Leidy 1856 maniraptoran
 Theropoda - Dromaeosauridae
Dromaeosauridae indet.5 Colbert and Russell 1969 maniraptoran
cf. Bambiraptor feinbergi2 Burnham et al. 2000 maniraptoran
MOR 553S-7.30.91.274
Richardoestesia sp.5 Currie et al. 1990 maniraptoran
Saurornitholestes sp.5 Sues 1978 maniraptoran
Aves
 Enantiornithes - Avisauridae
"Avisaurus gloriae n. sp." = Gettyia gloriae6
"Avisaurus gloriae n. sp." = Gettyia gloriae6 Varricchio and Chiappe 1995 bird
Reptilia
 Theropoda - Ornithomimidae
Ornithomimidae indet.5 Marsh 1890 ornithomimid
 Theropoda - Tyrannosauridae
Daspletosaurus sp.3 Russell 1970 tyrannosaurine
Daspletosaurus horneri1 Carr et al. 2017 tyrannosaurine
 Pterosauria -
 Pterosauria - Azhdarchidae
Azhdarchidae indet.5 Nessov 1984 pterosaur
 Choristodera - Champsosauridae
Champsosauridae indet.5 Cope 1876 champsosaur
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet.5 Cuvier 1825 gar
 Gonorhynchiformes - Gonorhynchidae