Pickering, Lake Simcoe Area (Ordovician of Canada)

Also known as Lake Simcoe Area, Ontario, Whitby Formation Middle Member,

Where: Ontario, Canada (43.9° N, 79.0° W: paleocoordinates 25.4° S, 55.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Middle Member (Whitby Formation), Caradoc (458.4 - 449.5 Ma)

• PJW: this probably is Blue Mountain now.

• member-level stratigraphic resolution

Environment/lithology: shallow subtidal; brown, gray, calcareous shale

• Gradual shallowing.
• "[L]ight brown, brownish grey, and grey soft shale, which may be slightly petroliferous and slightly calcareous, and contains a minor amount of black and blue shale, and thin beds of dark carbonaceous shale. Mud cracks are common."

Size class: macrofossils

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 26297: authorized by Steven Holland, entered by Tori Hanson on 11.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Orthocerida - Orthoceratidae
"Orthoceras" cf. transversum
 Dissidocerida - Geisonoceratidae
Geisonoceras tenuistriatum
 Pseudorthocerida - Spyroceratidae
"cf. Cycloceras persculptum" = Spyroceras persculptum
"cf. Cycloceras persculptum" = Spyroceras persculptum Ruedemann 1926
Lingulata
 Lingulida - Obolidae
Leptobolus insignis
Trilobita
 Olenida - Olenidae
Triarthrus spinosus, Triarthrus canadensis
Triarthrus spinosus Billings 1857 trilobite
T. spinosus rougensis
Triarthrus canadensis Smith 1861 trilobite
Pterobranchia
 Graptoloidea - Climacograptidae
Climacograptus typicalis
Climacograptus typicalis Hall 1865 climacograptid