GSC loc. 69771 (Cambrian of Canada)

Where: Alberta, Canada (52.0° N, 116.8° W: paleocoordinates 2.4° S, 74.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Eurekia apopsis trilobite zone, Basal Silty Member (Survey Peak Formation), Furongian (497.0 - 485.4 Ma)

• Meterage and trilobite zone from Loch et al 1993

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, silty grainstone and lithified, flat-pebble conglomerate

• "Mainly interbedded silty calcisiltite grading to calcareous siltstone, thin-bedded, and flat-pebble conglomerate with biocalcarenite matrix, thin- and medium-bedded; minor thin interbeds of shale, olive-grey, calcareous, moderately resistant, ledgy." Aitken and Norford 1967 (p. 200)

Size class: macrofossils

Primary reference: J. D. Aitken and B. S. Norford. 1967. Lower Ordovician Survey Peak and Outram Formations, southern Rocky Mountains of Alberta. Bulletin of Canadian Petroleum Geology 15(2):150-207 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 229379: authorized by Melanie Hopkins, entered by Melanie Hopkins on 07.03.2023

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Rhynchonellata
 Orthida - Plectorthidae
Nanorthis hamburgensis
Tergomya
 Cyrtonellida - Cyrtolitidae
Sinuella sp.
Sinuella sp. Knight 1947
Trilobita
 Corynexochida - Missisquoiidae
"Missisquoia sp." = Parakoldinioidia
"Missisquoia sp." = Parakoldinioidia Endo 1937 trilobite
 Corynexochida - Illaenuridae
Ambonolium sp.
Ambonolium sp. Raymond 1924 trilobite
 Ptychopariida - Kingstoniidae
Larifugula triangulata
Larifugula triangulata trilobite
pygidia
 Ptychopariida - Plethopeltidae
Leiocoryphe cf. occipitalis, Plethopeltis obtusus
Leiocoryphe cf. occipitalis Rasetti 1944 trilobite
Plethopeltis obtusus trilobite
cranidium
 Asaphida - Ptychaspididae
Idiomesus sp.
Idiomesus sp. Raymond 1924 trilobite
 Asaphida - Eurekiidae
Bayfieldia sp., Corbinia horatio
Bayfieldia sp. Clark 1924 trilobite
Corbinia horatio Walcott 1924 trilobite
cranidia + pygidia + librigena