Where: Northwest Territories, Canada (68.0° N, 135.4° W: paleocoordinates 64.6° N, 61.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Richardson Mountains Formation, Early/Lower Callovian (164.7 - 161.2 Ma)

• PJW: Savik formation elevated to Group. However, this is nowhere near the Savik group. The Richardson Mountains formation is the Bajocian - Callovian aged rock in the Alavik Range area, underlying the Alavik formation and overlying the Manuel Creek formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Preservation: mold/impression

Collected by J.A. Jeletzky in 1955; reposited in the GSC

Primary reference: H. Frebold. 1964. The Jurassic faunas of the Canadian Arctic, Cadoceratinae. Geological Survey of Canada Bulletin 119:1-27more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 236663: authorized by Matthew Clapham, entered by Matthew Clapham on 19.10.2024

Creative Commons license: CC BY (attribution)