GSC 92602, Murray Ridge Fm, Murray Ridge, northern Yukon (Jurassic of Canada)

Where: Yukon, Canada (68.0° N, 136.4° W: paleocoordinates 52.3° N, 59.4° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Murray Ridge Formation (Bug Creek Group), Sinemurian (199.3 - 190.8 Ma)

• Raricostatum Zone, sample from concretions loose 0.6 to 38 m above base of Jurassic

Environment/lithology: marine; shale and siltstone

• Table 1 gives broad lithological descriptions of formations within the study area. The Murray Ridge Fm is predominantly shale and siltstone.

Size class: macrofossils

Preservation: concretion

Reposited in the GSC

Collection methods: surface (float),

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 34226: authorized by Arnold Miller, entered by Karen Layou on 22.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Entoliidae
Entolium sp. Meek 1865 scallop
 Pectinida - Pectinoidae
Camptonectes sp. Meek 1864 scallop
 Pectinida - Oxytomidae
Meleagrinella sp. Whitfield 1855 scallop
 Ostreida - Gryphaeidae
? Gryphaea sp. Lamarck 1801 oyster
 Pholadida - Pleuromyidae
? Pleuromya sp. Agassiz 1845 clam
 Pholadomyida - Pholadomyidae
Goniomya sp. Agassiz 1842 clam
Cephalopoda
 Ammonitida - Echioceratidae