Overlook Site, RTMP BB 118 (Cretaceous of Canada)

Also known as microvertebrate, DPP, Bonebed 118

Where: Alberta, Canada (50.7° N, 111.5° W: paleocoordinates 58.1° N, 76.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Dinosaur Park Formation (Belly River Group), Late/Upper Campanian (83.5 - 70.6 Ma)

• Microvertebrate sites of Brinkman (1990) are "...placed in stratigraphic sequence by reference to a disconformity located about sixty meters below the base of the Lethbridge Coal (Eberth, 1990). The stratigraphic position of each site is expressed in terms of meteres above or below the disconformity (Fig. 2, Brinkman, 1990)" where positive numbers are above and negative below.

• bed-level stratigraphic resolution

Environment/lithology: crevasse splay; lithology not reported

• Splay deposits typically comprise stacked sequences of interlaminated sands and siltstones separated by erosional surfaces, thus indicating repeated flooding and aggradation.
• The overlook site occurs in a 1 m thick lithosome of massive-to-highly contorted, fine-grained shelly sandstone. Shells comprise occasional unionid valves in a deposit rich in pisidiid valves and gastropod shells. Compressed, silicified plant fragments measuring up to 10 cm in maximum dimension are present and define poorly developed bedding planes.

Size classes: macrofossils, mesofossils

Collected by G. Dongl in 1985; reposited in the TMP

Collection methods: bulk, surface (float), sieve,

• Screenwashed elements were collected using a screen with 9 openings per centimeter.

Primary reference: D. B. Brinkman. 1990. Paleontology of the Judith River Formation (Campanian) of Dinosaur National Park, Alberta, Canada: evidence from vertebrate microfossil locality. Palaeogeography, Palaeoclimatology, Palaeoecology 78:37-54 [A. Behrensmeyer/A. Behrensmeyer/M. Carrano]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 47812: authorized by Robin Whatley, entered by Robin Whatley on 02.03.2005, edited by Matthew Carrano, Patricia Holroyd and John Alroy

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
  -
Bivalvia indet.2 Linnaeus 1758 clam
"pisidiid valves" are abundant
 Unionida - Unionidae
Unionidae indet.2 Rafinesque 1820 freshwater mussel
occasional
Gastropoda
  -
Gastropoda indet.2 Cuvier 1795 snail
abundant
Gnathostomata
  -
Reptilia
 Ornithischia -
 Ornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Ornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Theropoda - Dromaeosauridae
Saurornitholestes langstoni Sues 1978 maniraptoran
TMP 1987.153.0055
Dromaeosaurus albertensis4 Matthew and Brown 1922 maniraptoran
 Theropoda - Troodontidae
Troodon formosus Leidy 1856 maniraptoran
 Theropoda - Elongatoolithidae
Continuoolithus canadensis6 Zelenitsky et al. 1996 theropod
 Crocodylia -
Leidyosuchus canadensis Lambe 1907 crocodilian
 Choristodera -
Champsosaurus natator Parks 1933 choristodere
 Testudinata - Baenidae
Baenidae indet. Cope 1882 turtle
 Testudines - Trionychidae
Trionychinae indet.1 Gray 1825 softshell turtle
 Squamata -
Mammalia
  -
Mammalia indet. Linnaeus 1758 mammal
Amphibia
 Proteida - Batrachosauroididae
Opisthotriton kayi Auffenberg 1961 salamander
 Caudata - Urodela
Scapherpeton tectum Cope 1876 salamander
 Salientia -
Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
may be same as Atractosteus occidentalis in Table 1?
 Amiiformes - Amiidae
"Kindleia sp." = Cyclurus
"Kindleia sp." = Cyclurus Agassiz 1839 bowfin
 Teleostei -
 Albuliformes - Albulidae
Coriops amnicolus Estes 1969 bonefish
 Elopiformes - Phyllodontidae
Paralbula casei Estes 1969
 Esociformes - Esocidae
Estesesox foxi5 Wilson et al. 1992
 Salmoniformes -
Esocoidea indet. Bleeker 1859
Chondrichthyes
 Rajiformes - Rhinobatidae
Myledaphus bipartitus Cope 1876 guitarfish