CN-18-38: Cassinian, Canada
collected by W. D. Boyce 1976-

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Asaphida - Asaphidae
Isoteloides latimarginatus Fortey 1979
synonym of Isoteloides canalis
Trilobita - Proetida - Dimeropygidae
Ischyrotoma anataphra Fortey 1979
Trilobita - Proetida - Bathyuridae
Benthamaspis conica Fortey 1979
Benthamaspis cf. conica Fortey 1979
Uromystrum cf. affine (Poulsen 1937)
Bathyurellus affinis
Bathyurellus abruptus Billings 1865
Strigigenalis caudata (Billings 1865)
Jeffersonia timon (Billings 1865)
Jeffersonia angustimarginata Boyce 1989
synonym of Jeffersonia jenni
Bolbocephalus convexus (Billings 1865)
Bolbocephalus kindlei Boyce 1989
Catochia ornata Fortey 1979
Petigurus nero (Billings 1865)
Trilobita - Corynexochida - Illaenidae
Illaenus sp. Dalman 1827
Trilobita - Phacopida - Pliomeridae
Strotactinus insularis (Billings 1865)
see common names

Geography
Country:Canada State/province:Newfoundland and Labrador
Coordinates: 51.6° North, 55.9° West (view map)
Paleocoordinates:30.1° South, 45.3° West
Basis of coordinate:estimated from map
Geographic resolution:outcrop
Time
Period:Ordovician Epoch:Early/Lower Ordovician
10 m.y. bin:Ordovician 1-2
Key time interval:Cassinian Trilobite zone: Strigigenalis caudata
Age range of interval:482.00000 - 470.00000 m.y. ago
Stratigraphy
Geological group:St. George Formation:Catoche
Local section:Cape Norman Local bed:10.39-10.63 m
Local order:bottom to top
Lithology and environment
Primary lithology:gray lithified lime mudstone
Secondary lithology: wackestone
Lithology description: "dark blue-gray weathering, thin rubbly bedded, bioturbated; top of bed contains thin lenses of skeletal limes packstone and grainstone and spectacular patches of diagenetic dolostone-pseudobreccia [='primary dolostone that has been intensely, diagenetically dolomitized so that the original rock remains only as clots, streaks, and small masses surrounded by prismatic crystals and mosaics of white sparry dolomite'], white weathering."
Environment:peritidal
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Collectors:W. D. Boyce Collection dates:1976-87
Collection method comments: 10.8 meter unit collected at cm scale but only trilobite ranges reported.
Metadata
Database number:106241
Authorizer:M. Hopkins Enterer:M. Hopkins
Modifier:J. Alroy Research group:marine invertebrate
Created:2011-03-04 12:37:52 Last modified:2012-10-28 01:16:56
Access level:the public Released:2011-03-04 12:37:52
Creative Commons license:CC BY
Reference information

Primary reference:
35403. 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]