Where: Nunavut, Canada (75.8° N, 94.5° W: paleocoordinates 3.5° N, 32.7° W)
• coordinate estimated from map
• local area-level geographic resolution
When: Monograptus riccartonensis zone, Cape Phillips Formation, Sheinwoodian (433.4 - 430.5 Ma)
• Rohr et al.: "All of the localities are from the Monograptus riccartonensis Graptolite Zone within the Cape Phillips Formation..."
•
•Zhang: According to author, material is from between the murchisoni and lundgreni zones. This would make it Sheinwoodian, although author simply refers to it as Wenlockian.
• bed-level stratigraphic resolution
Environment/lithology: slope; shelly/skeletal limestone and calcareous shale
•SEP environmental call based on given info and regional context.
•
•Zhang: "...Formation...represents the slope-to-basinal facies equivalent of coeval platform carbonates that occur to S and E..."
•SEP environmental call based on given info and regional context
•
•Zhang: "..Formation consists of shale and thin bedded, laminated siltstone and limestone...Section [with faunas] broadly divisible into two lithofacies: a lower part about 25 m thick, consists mainly of medium grey, thin bedded argillaceous Lst that is variably dolomitic...and an upper part, about 65 m thick, consisting mainly of very dark grey, very thin bedded argillaceous Lst that is markedly bituminous and commonly planar laminated...These beds appear to represent sediment gravity flows that were derived from platform carbonates...some 10 km to the east. The brachiopods and conodonts were obtained from the bioclastic beds and are therefore presumed to be allochthonous."
Preservation: replaced with silica
Reposited in the GSC
Collection methods: bulk, hydrochloric
• Combined localities GSC C12272, C22184, C22187, and Perry localities BH-1-348,358,362,368,520, and 540.
•Wagner broke this up into individual localities.
Primary reference: D. M. Rohr, A.J. Boucot, and D.G. Perry. 1981. Silurian (Wenlockian) gastropods from Baillie-Hamilton Island, Canadian Arctic. Journal of Paleontology 55(2):331-339 [M. Foote/M. Foote/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 26009: authorized by Michael Foote, entered by Michael Foote on 30.09.2002, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Ostracoda | |
| |
Gastropoda | |
Pycnomphalus cf. obesus Lindström 1884 snail | |
Poleumita sp. Clarke and Ruedemann 1903 snail | |
"? Oriostoma clarki" = Hecetastoma clarki Rohr et al. 1981 snail | |
"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi
"Platyceras (Platyostoma) boggsi" = Platyostoma boggsi Rohr et al. 1981 snail BH-1-348 (8); BH-1-358 (22); BH-1-362 (20); BH-1-368 (6); BH-1-540 (2);
| |
"Platyceras (Orthonychia) baldwini" = Orthonychia baldwini
"Platyceras (Orthonychia) baldwini" = Orthonychia baldwini Rohr et al. 1981 snail | |
"Trochonema (Eunema) kaysi" = Globonema kaysi
"Trochonema (Eunema) kaysi" = Globonema kaysi Rohr et al. 1981 snail | |
| |
Rhynchonellata | |
Athyrididae indet.3 McCoy 1841 | |
Merista sp.3 Suess 1851 | |
Skenidioides operosa3 Johnson et al. 1976 | |
Spirinella struszi3 Zhang 1989 | |
Howellella sp.3 Kozlowski 1946 | |
Flabellitesia kessei3 Boucot et al. 1988
Ptychopleurella lenzi3 Zhang 1989 | |
Wangyuia thorsteinssoni3 Zhang 1989 | |
Epitomyonia clausula3 Johnson et al. 1976
Epitomyonia amplissima3 Zhang 1989 | |
Visbyella visbyensis3, Parmorthina havliceki3, Resserella canalis3, Isorthis sulcata3, Isorthis walmsleyi3, Isorthis jini3
Visbyella visbyensis3 Lindstrom 1861
Resserella canalis3 Sowerby 1839 | |
Zygatrypa stenoparva3 Boucot et al. 1988 | |
Eospinatrypa bassetti3, Eospinatrypa sagana3, Plectatrypa unicosta3, "? Eospinatrypa savagei" = Plectatrypa savagei3
Eospinatrypa sagana3 Boucot et al. 1988
Plectatrypa unicosta3 Zhang 1989
"? Eospinatrypa savagei" = Plectatrypa savagei3 Zhang 1989 | |
Lissatrypa cf. atheroidea3 Twenhofel 1914 | |
Spirigerina copperi3 Zhang 1989 | |
? Glassia "sp. 2"3 Davidson 1881
? Glassia "sp. 1"3 Davidson 1881 | |
Stegerhynchus estonicus3 Rubel 1977 | |
Thebesia cf. thebesensis3 Foerste 1909
Rhynchotreta americaniformis3 Zhang 1989 | |
? Lissocoelina sp.3 Schuchert and Cooper 1931
? Rhipidium sp.3 Schuchert and Cooper 1931 | |
Conchidium cf. microlocularis3 Johnson et al. 1976
Cymbidium sp.3 Kirk 1926
Vosmiverstum breiveli3 Zhang 1989 | |
Clorinda sp.3 Barrande 1879 | |
"Grayina cf. magnifica" = Anastrophia (Grayina)3
"Grayina cf. magnifica" = Anastrophia (Grayina)3 | |
Strophomenata | |
Morinorhynchus crispus3 Lindström 1861
Morinorhynchus miniparvicostellus3 Zhang 1989 | |
Pentlandina harperi3 Zhang 1989 | |
Liljevallia amorpha3 Zhang 1989 | |
Amphistrophia sp.3 Hall and Clarke 1892 | |
Leptaena "Form 2"3 Dalman 1828 | |
Mesopholidostrophia salopiensis3 Cocks 1967 | |
"Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)3
"Paranisopleurella cooperi" = Eoplectodonta (Ygerodiscus)3 | |
"Opikella sp." = Leangella3
"Opikella sp." = Leangella3 Opik 1933 | |
"Aegiria grayi" = Jonesea grayi3 Davidson 1849 | |
Craniata | |
Trimerella sp.3 Billings 1862 |