B1 boulder bed, Broom Point North (Ordovician of Canada)

Where: Newfoundland and Labrador, Canada (49.8° N, 57.9° W: paleocoordinates 33.5° S, 53.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Symphysurina trilobite zone, Broom Point Member (Green Point Formation), Tremadocian (485.4 - 477.7 Ma)

• Local section is Broom Point North but meterage is not given in Fortey et al 1982. Collection placed at 156.4 m of section in James and Stevens 1986.

Environment/lithology: limestone

• Conglomerate deposited in slope environment (Green Point Formation) but clasts derived from inshore source.
• James and Stevens 1986: "Conglomerate--60% equant clasts (average 3x3 cm), 40% tabular clasts (average 2x6 cm)..."

Size class: macrofossils

Collected by R. A. Fortey, D. Skevington; reposited in the ROM

Collection methods: bulk,

Primary reference: R. A. Fortey, E. Landing, and D. Skevington. 1982. Cambrian-Ordovician boundary sections in the Cow Head Group, western Newfoundland. In M. G. Bassett, W. T. Dean (eds.), The Cambrian-Ordovician boundary: sections, fossil distributions, and correlations. National Museum of Wales, Geological Series No. 3, Cardiff 95-129 [M. Hopkins/M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 105867: authorized by Melanie Hopkins, entered by Melanie Hopkins on 26.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Artiopoda
 Agnostida - Agnostidae
Neoagnostus aspidoides Kobayashi 1955
Trilobita
 Proetida - Dimeropygidae
Pseudohystricurus cf. obesus, "Hystricurus paucituberculatus" = Tulepyge paucituberculata
Pseudohystricurus cf. obesus Ross 1951 trilobite
"Hystricurus paucituberculatus" = Tulepyge paucituberculata Fortey 1983 trilobite
 Asaphida - Nileidae
"Symphysurina brevispicata" = Symphysurina walcotti
"Symphysurina brevispicata" = Symphysurina walcotti Kindle 1929 trilobite