Carden Quarry, Bobcaygeon-Verulam contact zone (Ordovician of Canada)

Where: Ontario, Canada (44.6° N, 79.1° W)

• Paleocoordinates: 20.8° S, 107.5° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Corynoides americanus graptolite zone, Bobcaygeon-Verulam Formation (Simcoe Group), Katian (452.8 - 445.2 Ma)

• ...specimens were collected from blast piles sourced from stratigraphic intervals containing approximately 15m of upper Bobcaygeon and 5m of lower Verulam... PJW: Corynoides americanus zone spans Bobcaygeon & Verulam.

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, hardground, calcareous wackestone and lithified, hardground, calcareous siltstone

• The paleoenvironments in which the Bobcaygeon and Verulam formations were deposited have been interpreted as a proximal carbonate shelf that ranged in depth and proximity from shoal to shallow shelf in the Bobcaygeon and from deep shelf to shoal/shallow shelf in the Verulam (Armstrong, 2000).
• Both the Bobcaygeon and Verulam formations are comprised of bioclastic wackestones, grainstones, and packstones interbedded with calcareous shales and siltstones. The Verulam contains more shale than the underlying Bobcaygeon Formation (Liberty, 1969). Several hardgrounds have been documented in detail from the upper Bobcaygeon and lower Verulam (Brett and Liddell, 1978; Brett and Brookfield, 1984; Brett and Taylor, 1999).

Size classes: macrofossils, mesofossils

• ...numerous exceptionally preserved crinoid specimens with arms, stems, and attachment structures intact.

Preservation: original calcite

Collected by J. M. Koniecki; reposited in the UMMP

Collection methods: quarrying, surface (float), surface (in situ)

Primary reference: S. R. Cole, W. I. Ausich, D. F. Wright and J. M. Koniecki. 2018. An echinoderm Lagerstätte from the Upper Ordovician (Katian), Ontario: taxonomic re-evaluation and description of new dicyclic camerate crinoids. Journal of Paleontology 1-18 [S. Cole/S. Cole]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 192275: authorized by Selina Cole, entered by Selina Cole on 19.03.2018, edited by Phil Novack-Gottshall

Creative Commons license: CC0 (CC0)

Taxonomic list

Asteroidea
 Hadrosida - Urasterellidae
Anthroosasterias huxleyi2 Billings 1865 sea star
Crinoidea
 Homocrinida - Cincinnaticrinidae
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus1
"Isotomocrinus tenuis" = Cincinnaticrinus varibrachialus1 Warn and Strimple 1977 Sea lily
 Homocrinida - Anomalocrinidae
Anomalocrinus astrictus n. sp.1 Ausich et al. 2018 Sea lily
 Homocrinida - Homocrinidae
Daedalocrinus bellevillensis1 Billings 1883 Sea lily
 Eustenocrinida - Eustenocrinidae
Eustenocrinus springeri1 Ulrich 1925 Sea lily
 Calceocrinida - Calceocrinidae
Cremacrinus inaequalis1 Billings 1859 Sea lily
Cremacrinus guttenbergensis1 Kolata 1975 Sea lily
 Myelodactylida - Iocrinidae
Iocrinus trentonensis1 Walcott 1883 Sea lily
 Inadunata - Merocrinidae
Praecupulocrinus ? sp.3 Brower 1992 Sea lily
Praecupulocrinus conjugans3 Billings 1857 Sea lily
 Porocrinida -
Porocrinus conicus3 Billings 1857 Sea lily
 Hybocrinida - Hybocystitidae
Hybocystites problematicus1 Wetherby 1880 Sea lily
 Hybocrinida - Hybocrinidae
Hybocrinus tumidus1 Billings 1857 Sea lily
 Cladida - Plicodendrocrinidae
Plicodendrocrinus proboscidiatus3 Billings 1857 Sea lily
 Cyathocrinida - Euspirocrinidae
Simcoecrinus mahalaki n. gen. n. sp.3
Simcoecrinus mahalaki n. gen. n. sp.3 Wright et al. 2019 Sea lily
 Dendrocrinida - Dendrocrinidae
Dendrocrinus simcoensis3 Wright et al. 2019 Sea lily
 Taxocrinida - Taxocrinidae
Protaxocrinus laevis3 Billings 1857 Sea lily
 Flexibilia - Cupulocrinidae
Cupulocrinus jewetti3 Billings 1859 Sea lily
Cupulocrinus humilis3 Billings 1857 Sea lily
 Inadunata - Metabolocrinidae
Konieckicrinus brechinensis n. gen. n. sp.3 Wright et al. 2019 Sea lily
Konieckicrinus josephi n. sp.3 Wright et al. 2019 Sea lily
 Camerata - Reteocrinidae
Reteocrinus alveolatus Miller and Gurley 1894 Sea lily
Reteocrinus stellaris Billings 1859 Sea lily
 Diplobathrida - Rhodocrinitidae
Archaeocrinus maraensis n. sp. Cole et al. 2018 Sea lily
Archaeocrinus sundayae n. sp. Cole et al. 2018 Sea lily