B1-6, Broom Point North (Cambrian of Canada)

Where: Newfoundland and Labrador, Canada (49.8° N, 57.9° W: paleocoordinates 35.7° S, 60.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Missisquoia trilobite zone, Broom Point Member (Green Point Formation), Trempealeauan (501.0 - 485.4 Ma)

• Local section is Broom Point North but meterage is not given in Fortey et al 1982, althougth "-6" refers to approximate meterage below B1 boulder bed. Collection placed at 145.9 m of section in James and Stevens 1986.

Environment/lithology: slope; gray, green, argillaceous limestone and nodular limestone

• Environmental interpretation based on James and Stevens 1986.
• James and Stevens 1986, p. 124: "Ribbon to parted limestone--layers 2-4 cm thick, evenly bedded to nodular, separated by green-gray argillaceous limestone."

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 105869: authorized by Melanie Hopkins, entered by Melanie Hopkins on 26.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• Radiograptus rosieranus flexibilis and numerous conodonts range through this interval.
 Corynexochida - Missisquoiidae
Lunacrania cf. trisecta, "Missisquoia cf. nasuta" = Lunacrania nasuta, "Missisquoia typicalis" = Parakoldinioidia stitti
Lunacrania cf. trisecta Kobayashi 1955 trilobite
"Missisquoia cf. nasuta" = Lunacrania nasuta Winston and Nicholls 1967 trilobite
"Missisquoia typicalis" = Parakoldinioidia stitti Fortey 1983 trilobite
 Asaphida - Nileidae
Symphysurina cf. spicata Ulrich in Walcott 1925 trilobite
 Olenida - Olenidae
Leiobienvillia terranovica Rasetti 1954 trilobite
Leptoplastides cf. marianus Hoek 1912 trilobite
Parabolinella triarthroides Harrington 1938 trilobite
sensu Shaw 1951
 Agnostida - Agnostidae
Gymnagnostus ? mexicanus Robison and Pantoja-Alor 1968 artiopod
 Agnostida - Metagnostidae
"Segmentagnostus sp." = Corrugatagnostus
"Segmentagnostus sp." = Corrugatagnostus Kobayashi 1939 artiopod