BH-23 (Ordovician of Canada)

Where: Newfoundland and Labrador, Canada (51.6° N, 56.0° W: paleocoordinates 32.5° S, 50.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Randaynia saundersi trilobite zone, Lower Member (Boat Harbour Formation), Demingian (485.4 - 478.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: peritidal; lithified, gray lime mudstone and wackestone

• "blue-gray, thin bedded; thin, buff dolomitic laminae, abundant bioturbation-burrows, trails buff, dolomitized. Bottom of bed slightly undulating. Top of bed depressed by overlying bed."

Size class: macrofossils

Collected by W. D. Boyce in 1976-87

Primary reference: W. D. Boyce. 1989. Early Ordovician trilobite faunas of the Boat Harbour and Catoche Formations (St. George Group) in the Boat-Harbour-Cape Norman area, Great Northern Peninsula, western Newfoundland. Geological Survey Branch, Department of Mines and Energy, Newfoundland and Labrador, Report 89-2 1-168 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 106209: authorized by Melanie Hopkins, entered by Melanie Hopkins on 04.03.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Proetida - Hystricuridae
Hillyardina levis, Parahystricurus smithiae, Hystricurus deflectus, Hystricurus oculilunatus
Hillyardina levis Boyce 1989 trilobite
Parahystricurus smithiae Boyce 1989 trilobite
Hystricurus deflectus Heller 1954 trilobite
Hystricurus oculilunatus Ross 1951 trilobite
 Asaphida - Symphysurinidae
Randaynia saundersi
Randaynia saundersi Boyce 1989 trilobite
Cephalopoda
  -
Cephalopoda indet.
Cephalopoda indet. Cuvier 1797
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
planispiral
Rhynchonellata
 Orthida - Orthidae
Orthidae indet.
Orthidae indet. Woodward 1852
 Pentamerida - Clarkellidae
Diaphelasma sp.