Section AV2, 208 m, Avalanche Lake (Silurian of Canada)

Also known as UALVP Loc. 980

Where: Northwest Territories, Canada (62.4° N, 127.1° W: paleocoordinates 9.1° N, 54.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Edgecombeaspis belli trilobite zone, Delorme Group, Llandovery (443.4 - 433.4 Ma)

• STRATIGRAPHIC RELATIONS: Delorme Group, inter-tonguing members of the Whittaker and Road River formations, in tongue 1R (Road River lithology; see Soehn et al., 2000). AGE: Early Silurian, Late Llandovery–Early Wenlock; ?upper Cyrtograptus sakmaricus-C. laqueus Graptolite Zone; Edgecombeaspis belli Trilobite Zone; Pentameroides septentrionalis-Hesperorthis avalanchensis Brachiopod Zone; Pseudooneotodus bicornis Conodont Superzone; upper Loganellia scotica-L. siberica GVZ. STRATIGRAPHIC POSITION: From 208 m.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, calcareous shale

• SPECIFIC LITHOLOGY: Finely to thickly–laminated calcareous shale. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Soehn in 1990

• COLLECTOR: K.L. Soehn, 1990. REPOSITORY: University of Alberta Laboratory for Vertebrate Paleontology (UALVP) of the Departments of Biological Sciences and Earth and Atmospheric Sciences, and in the University of Alberta Paleontology Collections (UAPC) of the Department of Earth and Atmospheric Sciences.

Primary reference: K. L. Soehn, T. Märss, M. W. Caldwell and M. V. H. Wilson. 2001. New and biostratigraphically useful thelodonts from the Silurian of the Mackenzie Mountains, Northwest Territories, Canada. Journal of Vertebrate Paleontology 21(4):651-659 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90314: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to taxa described in manuscript, and those characteristic taxa mentioned in text. NOMENCLATURE: Authoritative publication, with modern nomenclature.
Pteraspidomorpha
  - Thelodontidae
Lanarkia cf. horrida Traquair 1898
Gnathostomata
 Thelodontiformes - Archipelepididae
Archipelepis turbinata Soehn et al. 2001