District of Mackenzie, Trevor Range Section (Silurian of Canada)

Where: Northwest Territories, Canada (65.9° N, 134.2° W)

• Paleocoordinates: 5.6° N, 100.2° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: Silurian (443.8 - 419.2 Ma)

• No group or formation names given.

Environment/lithology: shallow subtidal; gray dolomite and gray limestone

• Dolomite, finely ro medium crystalline, dark grey to brown, sometimes siliceous, sometimes with lenses or nodules of chert, sometimes brecciated, thinly to massively beded. Limestone, light grey, weathers grey, resistant, medium bedded.

Size class: macrofossils

Collection methods: Section is broken down into 5 smaller collections in reference.

Primary reference: B. S. Norford. 1963. Reconnaissance of the Ordovician and Silurian rocks of Northern Yukon Territory. Geological Survey of Canada Department of Mines and Technical Surveys, Paper 63(39):1-139 [S. Holland/T. Hanson/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25483: authorized by Steven Holland, entered by Tori Hanson on 13.09.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

unclassified
  -
"Streptelasmid" sp.
Streptelasmid coral, possibly Ordovician. Solitary and favositid corals also present.
Echinodermata spp. Klein 1754
Brachiopoda
  -
Brachiopoda spp. Cuvier 1805
includes orthid brachiopod
Rhynchonellata
 Atrypida - Glassiidae
? Glassia sp. Davidson 1881
 Spiriferida - Cyrtiidae
? Eospirifer sp. Schuchert 1913
Gastropoda
  -
Gastropoda indet. Cuvier 1795 snail
Anthozoa
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Heliolitida - Halysitidae
? Cystihalysites sp. Chernyshev 1941 tabulate coral
Cystihalysites or Halysites
? Halysites sp. von Waldheim 1813 tabulate coral
Cystihalysites or Halysites