Disappointment Bay Formation, Lowther Island, GSC loc. C-2682 (Devonian of Canada)

Also known as Reef 3265

Where: Nunavut, Canada (74.6° N, 97.7° W: paleocoordinates 7.9° S, 22.5° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Middle Member (Disappointment Bay Formation), Late/Upper Emsian (402.5 - 391.9 Ma)

• Three collections, C2681, C2682, and C3217, are in increasing stratigraphic order, the first from the lowest of three members, the second two from the middle member. C2682 seen as correlative with Eurekaspirifer pinyonensis Zone of Nevada and conodont zone 9 of Klapper et al. 1971.

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; dolomitic reef rocks

• SEP environmental call based on given info
• Formation as a whole: "basal conglomerate, fine grained sandstone, and predominantly limestone and dolomite." "The lower member is a dark limestone 125 feet thick...The middle member is 325 feet thick and consists of a light-colored dolomite including reef knolls developed at its base...The upper member consists of anhydrite, sandstone, siltstone, and dolomite and has not yielded fossils."

Size class: macrofossils

Reposited in the GSC

Primary reference: J. G. Johnson. 1975. Late Early Devonian brachiopods from the Disappointment Bay Formation, Lowther Island, Arctic Canada. Journal of Paleontology 49(6):947-978 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 26624: authorized by Michael Foote, entered by Michael Foote on 18.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Focus here is on brachiopods. Some other elements mentioned in passing.
Conodonta
 Ozarkodinida - Polygnathidae
 Ozarkodinida -
Gastropoda
 Euomphalina - Platyceratidae
Platyceras sp. Conrad 1840 snail
"a number"
Rhynchonellata
 Pentamerida - Gypidulidae
 Rhynchonellida - Hebetoechiidae
 Rhynchonellida - Trigonirhynchiidae
 Spiriferida - Reticulariidae
 Spiriferida - Adolfiidae
 Atrypida - Atrypidae
"Spinatrypa (Invertrypa) sp." = Invertrypa, Atrypa "sp. A", Atrypa "sp. B"
"Spinatrypa (Invertrypa) sp." = Invertrypa
Atrypa "sp. A" Dalman 1828
Atrypa "sp. B" Dalman 1828
 Atrypida - Carinatinidae
 Athyridida - Athyrididae
 Orthida - Schizophoriidae
Strophomenata
 Strophomenida - Douvillinidae
Cymostrophia sp. Caster 1939
 Strophomenida - Strophochonetidae
 Productida - Productellidae
? Spinulicosta sp.
originally entered as "Spinulacosta," but listed in table as Spinulicosta
 Orthotetida - Schuchertellidae
Trilobita
 Harpetida - Harpetidae