Mount Brock, Smithers Formation (Jurassic of Canada)

Where: British Columbia, Canada (57.1° N, 130.5° W: paleocoordinates 36.4° N, 71.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hazelton Group, Toarcian (182.7 - 174.1 Ma)

• early-middle Toarcian, Hazelton Group, in the "Mount Brock volcanics"

• bed-level stratigraphic resolution

Environment/lithology: marine; tuff and shelly/skeletal packstone

• volcanics interfinger with fossiliferous sedimentary rocks...a remarkably fossiliferous bioclastic limestone bed.

Size class: macrofossils

Primary reference: J. Palfy, P. L. Smith, and J. K. Mortensen. 2000. A U-Pb and 40Ar/39Ar time scale for the Jurassic. Canadian Journal of Earth Sciences 37(6):923-944 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37555: authorized by John Alroy, entered by Erin Leckey on 16.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Dactylioceratidae
"Dactylioceras cf. simplex" = Dactylioceras (Eodactylites) simplex, "Dactylioceras cf. pseudocommune" = Dactylioceras (Eodactylites) pseudocommune, Dactylioceras cf. kanense
"Dactylioceras cf. simplex" = Dactylioceras (Eodactylites) simplex Fucini 1935 ammonite
"Dactylioceras cf. pseudocommune" = Dactylioceras (Eodactylites) pseudocommune Fucini 1935 ammonite
Dactylioceras cf. kanense McLearn 1930 ammonite