Fauna c, Section AV1, Whittaker Fm., Mackenzie Mts. (Silurian of Canada)

Where: Northwest Territories, Canada (62.4° N, 127.0° W: paleocoordinates 9.0° N, 54.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Distomodus kentuckyensis zone, Whittaker Formation, Llandovery (443.4 - 433.4 Ma)

• Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages.)

• group of beds-level stratigraphic resolution

Environment/lithology: offshore shelf; argillaceous limestone and calcareous shale

• Early part of Sedimentary Grand Cycle 2 (transgressive pulse). "The strata assigned to the Whittaker Formation in these sections are largely deeper water platform margin or upper slope limestones and shales."

•SEP environmental call based on given information

• Whittaker Fm. in general: "Beneath a distinctive buff-brown coloured shale unit, assigned to the base of the Delorme Fm., the strata consist of interbedded argillaceous limestones, calcareous shales, and cherty dolomites...The more carbonate-rich horizons contain rich silicified trilobite, conodont, and ostracode faunas. They also contain sparser coral, bryozoanb, brachiopod, mollusc, and other invertebrate faunas..."

Preservation: replaced with silica

Primary reference: B. D. E. Chatterton and D. G. Perry. 1983. Silicified Silurian odontopleurid trilobites from the Mackenzie Mountains. Palaeontographica Canadiana 1:1-55 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26029: authorized by Michael Foote, entered by Michael Foote on 01.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Strophomenida - Furcitellidae
Pentlandina sp.2 Bancroft 1949
Katastrophomena sp.2 Cocks 1968
 Orthida - Dalmanellidae
 Odontopleurida - Odontopleuridae
 Phacopida - Encrinuridae
Encrinurus sp. n. sp.1 Emmrich 1844 trilobite
 Phacopida - Calymenidae
Calymene sp. n. sp.3
Calymene sp. n. sp.3 Brongniart 1822 trilobite