Dufferin Aggregates Carden Quarry, Carden, Verulam Formation (Ordovician of Canada)

Where: Ontario, Canada (44.0° N, 79.0° W: paleocoordinates 25.3° S, 55.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Verulam Formation, Shermanian (457.3 - 449.6 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal; lithified limestone and lithified shale

• The overlying Verulam

•Formation is typically thinner bedded, contains a larger percentage of interbedded shale, and is interpreted as being deposited in a distal-shelf environment. The Bobcaygeon and Verulam formations were likely deposited in a subtropical environment 15°–20° south of the Upper Ordovician paleoequator (Brett and Taylor 1999), although Brookfield (1988)has suggested that these strata were deposited in a more temperate climate.

• The Bobcaygeon Formation is dominated by thin- to medium-bedded limestones ranging in lithology from mudstone to grainstone, frequently with interbedded shales, and was deposited in lagoonal, shoaling, and shallow-shelf environments (Brookfield and Brett 1988). The overlying Verulam Formation is typically thinner bedded, contains a larger percentage of interbedded shale,

Reposited in the UMMP

Primary reference: C. D. Sumrall and F.J. Gahn. 2006. Morphological and systematic reinterpretation of two enigmatic edrioasteroids (Echinodermata) from Canada. Canadian Journal of Earth Sciences 43(4):497-507 [P. Wagner/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 64568: authorized by Pete Wagner, entered by Pete Wagner on 10.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Edrioasteroidea
 Isorophida - Agelacrinitidae
Thresherodiscus ramosus