Pardonet Hill Patch Reef in Baldonnel Fm. (Triassic of Canada)

Also known as Reef 3887

Where: British Columbia, Canada (56.1° N, 123.0° W: paleocoordinates 30.1° N, 46.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Baldonnel Formation, Tuvalian (232.0 - 221.5 Ma)

• M. lindae subzone of M. nodosus conodont zone, indicated as lower upper Carnian. Upper Triassic Baldonnel Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: intrashelf or intraplatform reef; lithified reef rocks and mixed carbonate-siliciclastic

• Patch reefs on a low gradient carbonate ramp
• Bioclastic accumulations composed of crinoids, brachiopods, molluscs, spongiomorphs and scleractinian corals occur within Upper Triassic strata of the lower Baldonnel Formation at Pardonet Hill in northeastern British Columbia Canada. These small buildups (∼100 to 500 m3) have planar bases and broadly convex tops. These mounds are interpreted as small patch reefs composed of packstone, bioclastic floatstone/rudstone and carbonate breccia intercalated with mixed siliciclastic carbonate sediments deposited in a shallow subtidal setting (i.e. above fairweather wave base).

Size class: macrofossils

Collection methods: quarrying, peel or thin section,

Primary reference: J.-P. Zonneveld, C. M. Henderson, G. D. Stanley, Jr., M. J. Orchard, and M. K. Gingras. 2007. Oldest scleractinian coral reefs on the North American craton: Upper Triassic (Carnian), northeastern British Columbia, Canada. Palaeogeography, Palaeoclimatology, Palaeoecology 243(3-4):421-450 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 67003: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 01.11.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• List lumps data from three separate patch reefs (20 m thick interval). Rhynchenollid brachiopods explicitely noted to be absent.
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Echinoidea
 Cidaroida - Miocidaridae
Miocidaris utahensis
Miocidaris utahensis pencil urchin
Recombined from Lenticidaris utahensis
Asteroidea
 Valvatacea -
Carniaster orchardi
Carniaster orchardi Blake and Zonneveld 2004 sea star
Crinoidea
 Isocrinida - Isocrinidae
cf. Balanocrinus sp., Isocrinus sp.
cf. Balanocrinus sp. Agassiz 1847 Sea lily
Isocrinus sp. von Meyer 1836 Sea lily
Gnathostomata
  -
Osteichthyes indet., Chondrichthyes indet.
Chondrichthyes indet. Huxley 1880 cartilaginous fish
Rhynchonellata
 Spiriferinida - Spiriferinidae
Spiriferina abichi
Spiriferina abichi Oppel 1865
Cephalopoda
 Nautilida - Tainoceratidae
Sibyllonautilus liardensis
Sibyllonautilus liardensis Whiteaves 1889 nautiloid
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
Bivalvia
 Pectinida - Limidae
cf. Mysidioptera sp.
cf. Mysidioptera sp. Salomon 1895 file clam
 Ostreida - Bakevelliidae
Gervillia sp.
Gervillia sp. Defrance 1820 oyster
 Ostreida - Palaeolophidae
Actinostreon sp.
Actinostreon sp. Bayle 1878 oyster
listed as Lopha sp.
 Arcida - Parallelodontidae
cf. Parallelodon cf. monobensis
 Cardiida - Palaeocarditidae
cf. Palaeocardita sp.
cf. Palaeocardita sp. Conrad 1867 clam
Hydrozoa
 Lemniscaterina - Cassianastraeidae
cf. Cassianastraea sp.
 Spongiomorphida - Spongiomorphidae
Spongiomorpha sp.
Spongiomorpha sp. Frech 1890
Anthozoa
 Scleractinia - Reimaniphylliidae
Retiophyllia sp.
Retiophyllia sp. Cuif 1966 stony coral
 Scleractinia - Thamnasteriidae
"Thamnasteria" sp.
"Thamnasteria" sp. LeSauvage 1823 stony coral
 Scleractinia - Montlivaltiidae
Elysastraea sp., Margarastraea sp.
Elysastraea sp. Laube 1865 stony coral
Margarastraea sp. Frech 1896 stony coral
listed as Margarastaea