Zymoetz (Copper) River, Ashman Formation, level C4 (Jurassic to of Canada)

Where: British Columbia, Canada (54.6° N, 128.5° W: paleocoordinates 40.9° N, 71.9° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Smithers Formation (Hazelton Group), Bathonian to Bathonian (168.3 - 163.5 Ma)

• late Bathonian-early Callovian, layer is approx. 41 m above base of the section

• bed-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal siltstone and tuffaceous sandstone

• fossiliferous marine sedimentary rocks that overlie (presumably with disconformity) maroon tuffs that likely belong to the Red Tuff Member of the Nilkitkwa Formation. An 8 cm thick, pale blue, tuffaceous, clay-rich layer containing rare marine fossils was identified as a reworked volcanic ash. Strat colum shows sediments to be sandstones, siltstones and tuffaceous sandstones

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 37630: authorized by John Alroy, entered by Erin Leckey on 18.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Kosmoceratidae
Kepplerites sp. Neumayr and Uhlig 1892 ammonite
 Ammonitida - Sphaeroceratidae
Lilloettia cf. lilloetensis Crickmay 1930 ammonite
Iniskinites sp. Imlay 1975 ammonite
I. or Lilloettia sp. juvenile
Xenocephalites cf. vicarius Imlay 1953 ammonite
 Ammonitida - Perisphinctidae
 Phylloceratida - Phylloceratidae
Adabofoloceras sp. Joly 1977 ammonite