ammonites
RSMP, South of McDougall Pass, Tahkandit Fm. (Permian to of Canada)

Where: Yukon, Canada (67.5° N, 136.4° W: paleocoordinates 42.3° N, 22.5° W)

• coordinate stated in text

• basin-level geographic resolution

When: Tahkandit Formation, Leonard to Leonard (290.1 - 259.0 Ma)

• The time interval given by the authors is Leonardian and ? Guadalupian. The Permo-Pennsylvanian in the northern Yukon is ideally divided into three units called, in ascending order: Lower Limestone unit, Middle Recessive unit, and Tahkandit Formation (Nelson, 1961a, b, 1962b).

Environment/lithology: marine; sandstone and calcareous siltstone

• Lithologies are from stratigraphic columns in Text-Fig. 2 of article. Fossils collected from an additional lithology of silty to shaley limestone.

Size class: macrofossils

Collection methods: Authors counted brachiopods only, but listed other taxa present. Fossils were collected from five horizons in the Tahkandit Formation, but the horizons are not labeled in Text-Fig. 2 or listed elsewhere in the article.

Primary reference: S. J. Nelson and C. E. Johnson. 1968. Permo-Pennsylvanian brachythyrid and horridonid brachiopods from the Yukon Territory, Canada. Journal of Paleontology 42(3):715-746 [T. Olszewski/L. Fall] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 61635: authorized by Tom Olszewski, entered by Leigh Fall on 21.06.2006