Section AV2, 255-260 m, Avalanche Lake (Silurian to of Canada)

Also known as UALVP Loc. 1064

Where: Northwest Territories, Canada (62.4° N, 127.1° W: paleocoordinates 6.2° N, 50.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Struszia dimitrovi trilobite zone, Delorme Group, Sheinwoodian to Sheinwoodian (433.4 - 427.4 Ma)

• STRATIGRAPHIC RELATIONS: Delorme Group, inter-tonguing members of the Delorme and Road River formations, in tongue 1D (Delorme lithology; see Soehn et al., 2000). AGE: Early Silurian, late

•Sheinwoodian to early Homerian; Monograptus instrenuus-Cyrtograptus kolobus Graptolite Zone (riccartonensis-belophorus Generalized Graptolite Zone (GGZ)) to Cyrtograptus lundgreni-Monograptus testis Zone (5lundgreni GGZ); Struszia dimitrovi Trilobite Zone to Mackenziurus reimeri Zone; Vosmiverstum breiveli-Janius occidentalis Brachiopod Zone; upper Kockelella walliseri Conodont

•Superzone to bottom of Ozarkodina b. bohemica Conodont Zone (treated as an interval following S. sagitta Zone); Loganellia grossi GVZ to L. einari GVZ. STRATIGRAPHIC POSITION: From 255-260 m.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• SPECIFIC LITHOLOGY: Limestone. LITHIFICATION: Lithified, on the basis of facies description and sample preparation techniques.

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 90318: authorized by Austin Hendy, entered by Austin Hendy on 16.07.2009, edited by Uta Merkel

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.
Gnathostomata
 Phlebolepidiformes - Katoporididae
Overia adraini Soehn et al. 2001
Demospongea
 Streptosclerophorida - Hindiidae
Hindia sphaeroidalis Duncan 1879 demosponge
 Lithistida - Anthaspidellidae
Archaeoscyphia attenuata de Freitas 1989 demosponge
 Lithistida - Astylospongiidae
Carpospongia castanea Roemer 1861 demosponge