CAT-3. Cape Breton Island (Cambrian to of Canada)

Also known as CAT-3, Foster Point Formation, Cape Breton Island, Canada - Landing, 1991

Where: Nova Scotia, Canada (46.0° N, 60.0° W: paleocoordinates 78.9° S, 57.9° W)

• outcrop-level geographic resolution

When: Camenella baltica trilobite zone, Fosters Point Formation (Bonavista Group), Tommotian to Tommotian (530.0 - 516.0 Ma)

• Deposition shows a series of shoaling intervals. Catalone River bridge CAT-3

• group of beds-level stratigraphic resolution

Environment/lithology: peritidal; lithified, condensed, hardground, oncoidal wackestone and shale

• Deposition controled by epeirogenic extension. The Foster Formation marks a decrease in the rate of epeirogenic subsidence and/or rate of sealevel fall.
• condensed, red oncolitic, fossil wacke-to packstones with intercalated red shale

Size classes: macrofossils, mesofossils

Preservation: cast, original phosphate

Collection methods: bulk, chemical, mechanical,

• Collection shows appearance of abundant orthothecidsand hyolithids which are an important allochem locally. Limonitic or Mn/Fe molds or internal cavities also present.

Primary reference: E. D. Landing. 1991. Upper Precambrian through Lower Cambrian of Cape Breton Island: faunas, paleoenvironments, and stratigraphic revision. Journal of Paleontology 65(4):570-595 [M. Patzkowsky/P. Borkow/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 6897: authorized by Mark Patzkowsky, entered by Phil Borkow on 08.04.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• There is a presence of oncolites and planar to low LLH mats of cyanobacteria build-ups and indet. trilobite fragments. The indication of a+c type is acid-disaggreation and crack-out.
 Hallucishaniids -
 Orthothecida - Gracilithecidae
 Orthothecida - Allathecidae
Allatheca degeeri Holm 1893
a+c type
 Circothecida -
Ladatheca cylindrica Grabau 1900
a+c types
 Hyolithida - Hyolithidae
Eccentrotheca kanesia Landing et al. 1980
a+c types, 324 cap shaped sclerite, 1 fused sclerite, 41 broad sclerite
 Tommotiida - Sunnaginiidae
Sunnaginia imbricata Rozanov et al. 1969
a+c type, 72 right sclerite, 101 left sclerite, 53 indet. fragments
 Mitrosagophora - Tommotiidae
Camenella baltica Bengtson 1970
a+c type
 Lingulida - Obolidae
? Obolus groomi
a+c type
 Paterinida - Paterinidae
Paterina sp. Beecher 1891
 Pelagiellida - Aldanellidae
Aldanella attleborensis Shaler and Foerste 1888
a+c type
 Helcionellida - Helcionellidae
Randomia aurorae Matthew 1899
 Helcionellida - Stenothecidae
"Ginella acutacosta" = Stenotheca acutacosta Walcott 1890
a+c type
 Cambridioida - Cambridiidae
Stenothecoides sp. Resser 1938
a+c type
  - Halkieriidae
Halkieria fordi n. sp.
a+c types, 54 slender sclerite and 51 deltiform sclerite
 Ribeirioida - Ischyriniidae
? Ischyrinia sp. Billings 1866
 Fordillida - Fordillidae
Fordilla troyensis Barrande 1881 clam
 Hyolithelminthida - Hyolithellidae
Hyolithellus tenuis Rozanov and Missarzhevsky 1966
a+c types, 30 irregularly annulated conch and 3 evenly annulated conch
 Hyolithelminthida - Torellellidae
Torellella laevigata Linnarsson 1871
a+c types
 Chancelloriida - Chancelloriidae
Chancelloria sp. Walcott 1920
a+c types, 2 4-rayed sclerite and 52 6-rayed sclerite
Samsonoffoclavus matthewi n. gen. n. sp.
a+c types
Coleoloides typicalis
Coleoloides typicalis Walcott 1890
a+c types, also Coleoloides typicalis tubes present