Southern Manitoba, East Arm Dolomite, Reader Lake (Silurian to of Canada)

Where: Manitoba, Canada (53.9° N, 101.3° W: paleocoordinates 8.6° S, 51.7° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: East Arm Dolomite Formation (Interlake Group), Telychian to Telychian (438.5 - 427.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: gray dolomite

• Environmental call by T. Hanson.
• Type section is dolomite, light olive-gray, very fine grained, thick to medium bedded, local concentric bedding caused by sediment-trapping algae, salt crystal moulds.

Size class: macrofossils

Primary reference: C. W. Stearn. 1956. Stratigraphy and palaeontology of the Interlake Group and Stonewall Formation of Southern Manitoba. Geological Survey of Canada Memoir 281:1-162 [S. Holland/T. Hanson/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 26674: authorized by Steven Holland, entered by Tori Hanson on 23.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ostracoda
 Leperditicopida - Leperditiidae
cf. Leperditia phaseola
 Leperditicopida - Isochilinidae
Dihogmochilina latimarginata
Rhynchonellata
 Athyridida - Athyrididae
Meristospira dunbari
Stromatoporoidea
 Actinostromatida - Actinostromatidae
Actinostroma sp.
Actinostroma sp. Nicholson 1886 stromatoporoid sponge
Anthozoa
 Favositida - Theciidae
Corrugopora praecursor
Corrugopora praecursor tabulate coral
 Heliolitida - Halysitidae
Halysites catenularia
Halysites catenularia Linnaeus 1767 tabulate coral