GSC 94027, Murray Ridge Fm, Jurassic Butte, Northwest Territories (Jurassic of Canada)

Where: Northwest Territories, Canada (68.0° N, 135.4° W: paleocoordinates 52.2° N, 58.8° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Scho Creek Member (Murray Ridge Formation), Sinemurian (199.3 - 190.8 Ma)

• Fossils loose on Murray Ridge shale, probably from Scho Creek Member. This overturned section was previously described by Jeletzky (1967), Sec. 24, p. 102-104, Pl. 6, fig. 1. See Poulton et al. (1982), Sec. PU-2, 26-76

Environment/lithology: marine; sandstone and conglomerate

• Table 1 gives broad lithological descriptions of formations within the study area. The Scho Creek Fm is predominantly sandstone and conglomerate.

Size class: macrofossils

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 34230: authorized by Arnold Miller, entered by Karen Layou on 22.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pholadomyida - Pholadomyidae
"Pholadomya idea" = Pholadomya (Pholadomya) idea
"Pholadomya idea" = Pholadomya (Pholadomya) idea d'Orbigny 1850 clam
Cephalopoda
 Ammonitida - Echioceratidae
 Ammonitida - Asteroceratidae