Where: Alberta, Canada (52.0° N, 116.8° W: paleocoordinates 2.3° S, 72.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Symphysurina brevispicata trilobite zone, Putty Shale Member (Survey Peak Formation), Tremadocian (485.4 - 477.7 Ma)

• Loch et al 1993 record the footage here as 157 ft (51.5 m), but Aitken and Norford 1967 report the footage at 149-150 ft. Because other footages are consistent between the two references, the Loch et al is considered an error.

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, brown, gray, calcareous shale and lithified, flat-pebble conglomerate

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 229374: authorized by Melanie Hopkins, entered by Melanie Hopkins on 07.03.2023

Creative Commons license: CC BY (attribution)