Section AV4, 126-127mT, Avalanche Lake (Silurian of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.1° W: paleocoordinates 6.9° N, 51.6° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Delorme Formation, Sheinwoodian (433.4 - 430.5 Ma)

• talus sample from 126-127 m above base of the section

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified lime mudstone and lithified wackestone

• Benthic Assemblage 5
• thin-bedded lime mudstones to wackestone

Size class: macrofossils

Primary reference: J. K. Rigby and B. D. E. Chatterton. 1999. Silurian (Wenlock) demosponges from the Avalanche Lake area of the Mackenzie Mountains, southwestern District of Mackenzie, Northwest Territories, Canada. Palaeontographica Canadiana 16:1-43 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 121301: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.12.2011, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

Rostroconchia
 Conocardiida - Pseudobigaleaidae
Avalanchia pterocarina1 Caldwell and Chatterton 1995
Nehedia bainsi2 Johnston and Chatterton 1983
Demospongea
 Lithistida - Anthaspidellidae
Patellispongia alternata Rigby and Chatterton 1989 demosponge