GSC Loc. 82529. Dawson Point wharf (Silurian of Canada)

Also known as Locality 8. Lake Timiskaming

Where: Ontario, Canada (47.5° N, 79.6° W: paleocoordinates 20.8° S, 45.4° W)

When: Pterospathodus celloni conodont zone, Thornloe Formation, Telychian (438.5 - 433.4 Ma)

• The Thornloe lies above the Earlton and below the Cordell Dolomite. The Pentamerus bed here is the Upper Pentamerus Bed of the formation sensu Bolton & Copeland. However, that is now the basal bed of the formation: the lower beds are now placed in the Earlton Formation (Russell 1984; Radcliffe 1998).

• group of beds-level stratigraphic resolution

Environment/lithology: gray, blue limestone and shale

• Massive to thin-bedded blue-grey limestone with thin shale partings; thin bed of intraformational conglomerate near middle of section

Size class: macrofossils

Reposited in the GSC

Primary reference: T. E. Bolton and M. J. Copeland. 1972. Paleozoic formations and Silurian biostratigraphy, Lake Timiskaming region, Ontario and Quebec. Geological Survey of Canada, Paper 72-15:1-49 [G. Webster/G. Webster]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184765: authorized by Pete Wagner, entered by Pete Wagner on 21.03.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Encrinuridae
Encrinurus sp. Emmrich 1844 trilobite
Ostracoda
 Beyrichiacea - Zygobolbidae
 Palaeocopida - Beyrichiidae
Bolbineossia sp. Kesling et al. 1958 ostracod
Apatobolbina sp. Ulrich and Bassler 1923 ostracod
Rhynchonellata
 Pentamerida - Pentameridae
Pentamerus sp. Sowerby 1813
 Atrypida - Atrypidae
 Rhynchonellida - Leptocoeliidae
Bivalvia
 Ostreida - Pterineidae
Pterinea sp. Goldfuss 1832 oyster
Gastropoda
 Euomphalina - Euomphalidae
Euomphalopterus sp. Roemer 1876 snail
 Murchisoniina - Hormotomidae
Hormotoma sp. Salter 1859 snail
Anthozoa
 Favositida - Favositidae
Favosites spp. Lamarck 1816 tabulate coral
 Favositida - Multisoleniidae
Multisolenia tortuosa Fritz 1937 tabulate coral
 Rugosa - Chonophyllidae
 Stauriida - Ptychophyllidae