Also known as Exshaw Formation at Mount Arete
Where: Alberta, Canada (52.4° N, 116.9° W: paleocoordinates 6.1° S, 43.6° W)
• coordinate stated in text
• small collection-level geographic resolution
When: Palmatolepis expansa conodont zone, Lower Black Shale Member (Exshaw Formation), Late/Upper Famennian (364.7 - 360.7 Ma)
• Collection is a small lens.Undoubtedly Famennian brachiopods are said to co-occur with Mississippian-aspect conodonts. Raasch suggests that the Devonian fossils are part of a lag deposit.
• bed-level stratigraphic resolution
Environment/lithology: marine; black shale and pyritic siltstone
Size classes: macrofossils, mesofossils
Primary reference: G. O. Raasch. 1988. Famennian faunal zones in western Canada. In N. J. McMillan, A. F. Embry, and D. J. Glass (eds.), Devonian of the World, Volume III. Canadian Society of Petroleum Geologists. Calgary, Alberta, Canada 619-631 [M. Foote/M. Foote/M. Foote]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 35545: authorized by Michael Foote, entered by Michael Foote on 19.12.2003
Creative Commons license: CC BY (attribution)
Taxonomic list
Scyphozoa | |
"Conularia" marionensis jellyfish | |
Deuteropoda | |
Ostracoda indet. Latreille 1802 ostracod | |
Lophophorata | |
Lingulata | |
Strophomenata | |
Schuchertella lens White 1862 | |
Orbinaria pyxidata Hall 1858 | |
Rhynchonellata | |
"Camerophoria cf. hamburgensis" = Stenoscisma
"Camerophoria cf. hamburgensis" = Stenoscisma | |
"? Allorhynchus louisianensis" = Dorsisinus louisianensis
"? Allorhynchus louisianensis" = Dorsisinus louisianensis Weller 1914 | |
Rhipidomella missouriensis Swallow 1860 | |
Stenolaemata | |
Fenestrellina sp. d'Orbigny 1849 | |
Ceramopora sp. Hall 1851 | |
Rhombopora sp. Meek 1872 | |
Bivalvia | |
"Grammysia cf. hannibalensis" = Ectogrammysia hannibalensis
"Grammysia cf. hannibalensis" = Ectogrammysia hannibalensis Shumard and Swallow 1858 clam | |
Gastropoda | |
Naticopsis sp. M'Coy 1844 snail | |
Cephalopoda | |
Imitoceras aff. discoidale ammonite | |
Crinoidea | |
Crinoidea indet. Miller 1821 Sea lily | |
unclassified | |
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