GSC 41454, Basal member, Murray Ridge, Northwest Territories (Jurassic of Canada)

Where: Northwest Territories, Canada (68.0° N, 136.4° W: paleocoordinates 50.1° N, 60.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Hettangian (201.3 - 199.3 Ma)

• only strat info given is "Basal member". This unit does not appear in Table 1. Based on identical locality descriptions previously given in the text, this is probably the basal unit of the Murray Ridge Fm, which is the basal formation within the Bug Creek Group.

Environment/lithology: marine; sandstone and siltstone

• Based on previous locality information, the unit must be within the Bug Creek Group. Therefore, the broad description of the Bug Creek Grp (predominantly sandstones and siltstones and shales) given in Table 1 was used.

Size class: macrofossils

Reposited in the GSC

Collection methods: surface (in situ),

Primary reference: T.P. Poulton. 1991. Hettangian through Aalenian (Jurassic) guide fossils and biostratigraphy, Northern Yukon and adjacent Northwest Territories. Geological Survey of Canada Bulletin (410)1-95 [A. Miller/K. Layou/K. Layou]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 34185: authorized by Arnold Miller, entered by Karen Layou on 21.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Crinoidea
 Isocrinida - Pentacrinitidae
Seirocrinus sp.
Seirocrinus sp. Gislen 1924 Sea lily
Rhynchonellata
 Rhynchonellida -
Rhynchonellida indet.
Gastropoda
 Pleurotomarioidea - Pleurotomariidae
Pleurotomaria sp.
Pleurotomaria sp. Defrance 1826 snail
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
 Pectinida - Pectinoidae
? Eopecten sp.
? Eopecten sp. Douvillé 1897 scallop
 Pectinida - Entolioididae
Kolymonectes staeschei
Kolymonectes staeschei Polubotko 1968 scallop
 Pectinida - Oxytomidae
? Oxytoma sp.
? Oxytoma sp. Meek and Hayden 1865 scallop
 Pectinida - Limidae
? Lima sp.
? Lima sp. Bruguière 1797 file clam
 Pectinida - Plicatulidae
Harpax sp.
Harpax sp. Parkinson 1811 scallop
 Pectinida - Entoliidae
? Entolium sp.
? Entolium sp. Meek 1865 scallop
 Ostreida - Gryphaeidae
? Gryphaea sp.
? Gryphaea sp. Lamarck 1801 oyster
 Cardiida - Corbiculidae
"Corbicula" sp.
"Corbicula" sp. Megerle 1811 clam
 Thraciida - Thraciidae
? Thracia sp.
? Thracia sp. Blainville 1824 clam
 Trigoniida - Trigoniidae
Liotrigonia atirdjakensis