Kirkfield vicinity, Lake Simcoe area (Ordovician to of Canada)

Where: Ontario, Canada (44.6° N, 79.0° W: paleocoordinates 24.9° S, 54.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Belodina confluens - Oulodus velicuspis conodont zone, Lower Member (Lindsay Formation), Edenian to Edenian (451.0 - 449.6 Ma)

• Formerly thought to be Trentonian, but now considered Edenian - Maysvillian (PJW 2017-04-18). Lindsay overlies Verulam Formation. Liberty separated the Collingwood from the Liberty, so this is the lower member.

• member-level stratigraphic resolution

Environment/lithology: deep subtidal; gray, argillaceous limestone and shale

• Possible shallow-water sedimentation.
• "The formation consists generally of grey to greenish grey, fine-grained, argillaceous limestone in beds from an inch to 2 feet thick. It also includes shale partings, as much as 2 inches thick, along most bedding planes. Interbedded are a few beds 8 to 12 inches thick, of medium-crystalline, crinoidal limestone and calcarenite, the latter commonly enclosing leses of fine to coarse conglomerate and breccia."

Size class: macrofossils

Collection methods: Fossils collected by Dr. J. F. Caley and/or the writer, identified by officers of the Geological Survey of Canada.

Primary reference: B. A. Liberty. 1969. Palaeozoic geology of the Lake Simcoe Area, Ontario. Geological Survey of Canada Memoirs (355)1-201 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26294: authorized by Steven Holland, entered by Tori Hanson on 11.10.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Rhynchotremaa increbescens
Lingulata
 Lingulida - Lingulasmatidae
"Lingula cobourgensis" = Lingulasma cobourgensis
"Lingula cobourgensis" = Lingulasma cobourgensis Billings 1865
Strophomenata
 Strophomenida - Sowerbyellidae
Sowerbyella subovalis, "Sowerbyella punctostriata" = Sowerbyella curdsvillensis, "Sowerbyella sericea" = Sowerbyella (Sowerbyella) sericea
"Sowerbyella punctostriata" = Sowerbyella curdsvillensis Foerste 1912
"Sowerbyella sericea" = Sowerbyella (Sowerbyella) sericea Sowerby 1839
 Strophomenida - Strophomenidae
Opikina platys, Opikina rugosa, Strophomena billingsi
Opikina platys Wilson 1944
Opikina rugosa Wilson 1921
Strophomena billingsi Winchell and Schuchert 1893
 Strophomenida - Rafinesquinidae
Rafinesquina declivis, "Rafinesquina intermedia" = Rafinesquina alternata intermedia, "Rafinesquina alata" = Rafinesquina alternata alata2, Rafinesquina deltoidea
"Rafinesquina intermedia" = Rafinesquina alternata intermedia Wilson 1944
"Rafinesquina alata" = Rafinesquina alternata alata2 Wilson 1944
R. alternata plana and R. alternata intermedia
Rhynchonellata
 Pentamerida - Parastrophinidae
"Parastrophia cf. trentonensis" = Parastrophina, Parastrophina hemiplicata
"Parastrophia cf. trentonensis" = Parastrophina
 Atrypida - Cyclospiridae
Cyclospira bisulcata
 Atrypida - Anazygidae
Catazyga headi, "Zygospira recurvirostris" = Anazyga recurvirostra
Catazyga headi Billings 1862
C. headi filistriata
"Zygospira recurvirostris" = Anazyga recurvirostra Hall 1847
 Orthida - Dalmanellidae
Paucicrura rogata
Paucicrura rogata Sardeson 1892
 Orthida - Plaesiomyidae
Dinorthis cf. pectinella
 Orthida - Glyptorthidae
Glyptorthis bellarugosa
Stenolaemata
 Trepostomata - Trematoporidae
Batostoma cf. humila
 Cryptostomata - Palescharidae
Paleschara sp.
Cephalopoda
 Ascocerida - Probillingsitidae
Probillingsites primus
Bivalvia
 Cyrtodontida - Cyrtodontidae
Vanuxemia sp.
Vanuxemia sp. Billings 1858 clam
Gastropoda
 Euomphalina - Euomphalidae
"Helicotoma spinosa" = Linsleyella spinosa
"Helicotoma spinosa" = Linsleyella spinosa Salter 1859 snail
 Bellerophontida - Tropidodiscidae
? Tropidodiscus sp.
? Tropidodiscus sp. Meek and Worthen 1866 snail
 Bellerophontida - Sinuitidae
"Sinuites cancellatus" = Sinuites cancellatus, "Sinuites corrugatus" = Sinuites cancellatus1
"Sinuites cancellatus" = Sinuites cancellatus Hall 1847 snail
S. cancellatus and S. cancellatus angularis
"Sinuites corrugatus" = Sinuites cancellatus1 Hall 1847 snail
S. bilobatus corrugatus
 Murchisoniina - Lophospiridae
Lophospira perangulata
Lophospira perangulata Hall 1847 snail
 Murchisoniina - Trochonematidae
"Trochonema umbilicatum" = Trochonema umbilicata
"Trochonema umbilicatum" = Trochonema umbilicata Hall 1847 snail
 Murchisoniina - Hormotomidae
Hormotoma cf. gracilis, Hormotoma simplex
Hormotoma cf. gracilis Hall 1847 snail
Hormotoma simplex Wilson 1932 snail
 Murchisoniina - Murchisoniidae
"Hormotoma salteri" = Cyrtostropha salteri
"Hormotoma salteri" = Cyrtostropha salteri Ulrich and Scofield 1897 snail
H. salteri canadensis
 Murchisoniina - Loxonematidae
"Hormotoma trentonensis" = Omospira trentonensis
"Hormotoma trentonensis" = Omospira trentonensis Ulrich and Scofield 1897 snail
 Murchisoniina - Subulitidae
Fusispira subfusiformis, Subulites elongatus
Fusispira subfusiformis Hall 1847 snail
Subulites elongatus Portlock 1843 snail
Trilobita
 Asaphida - Asaphidae
Isotelus gigas, "Pseudogygites canadensis" = Pseudogygites latimarginatus
Isotelus gigas Dekay 1824 trilobite
"Pseudogygites canadensis" = Pseudogygites latimarginatus Hall 1847 trilobite
 Lichida - Lichidae
"Acrolichas sp." = Amphilichas
"Acrolichas sp." = Amphilichas Raymond 1905 trilobite
 Corynexochida - Illaenidae
"Illaenus americanus" = Thaleops laurentiana
"Illaenus americanus" = Thaleops laurentiana Amati and Westrop 2004 trilobite
 Phacopida - Cheiruridae
Ceraurus pleurexanthemus
Ceraurus pleurexanthemus Green 1832 trilobite
Crinoidea
 Monobathrida - Glyptocrinidae
cf. Schizocrinus nodosus
Scyphozoa
 Conulariida - Conulariidae
Conularia trentonensis
1Wahlman 1992; 2Wilson 1946