RTMP L2428, East tributary of Bighorn Creek, Ya Ha Tinda (Jurassic of Canada)

Where: Alberta, Canada (51.8° N, 115.5° W: paleocoordinates 40.5° N, 49.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Poker Chip Shale Member (Fernie Formation), Bifrons (182.0 - 175.6 Ma)

• Upper surface of a thin, resistant siltstone bed estimated to be 20 m above the base of the Poker Chip Shale, correlating with the serpentinum–bifrons Zones (Hall et al. 1998) (Fig. 1). Recent field work at this locality, which was carefully correlationed with Hall’s original stratigraphic columns and notes using multiple lithologically distinctive units (Them et al. 2017), suggests a latest serpentinum– earliest bifrons Zone age for this horizon (roughly 8 m above the base of the Poker Chip Shale.

Environment/lithology: offshore; lithified siltstone

Size class: macrofossils

Collected by R. Hall in 1996; reposited in the TMP

Primary reference: E. E. Maxwell and R. C. Martindale. 2017. New Saurorhynchus (Actinopterygii: Saurichthyidae) material from the Early Jurassic of Alberta, Canada. Canadian Journal of Earth Sciences 54:714-719 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 186707: authorized by Matthew Clapham, entered by Matthew Clapham on 01.07.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Saurichthyiformes - Saurichthyidae
Saurorhynchus acutus Agassiz 1844
TMP 1996.076.0001