ammonites
Diagonal Mountain 3a, Smithers Formation (Jurassic to of Canada)

Where: British Columbia, Canada (56.7° N, 127.3° W: paleocoordinates 44.1° N, 71.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Smithers Formation (Hazelton Group), Bathonian to Bathonian (167.7 - 161.2 Ma)

• late Bathonian-early Callovian, below the tuff layer

• bed-level stratigraphic resolution

Environment/lithology: marine; mudstone and tuff

• cream-coloured tuff layer interbedded in a thick succession of dark mudstone

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 37625: authorized by John Alroy, entered by Erin Leckey on 18.03.2004

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)