Section 5, sample 214 (Ordovician to of Canada)

Where: Nunavut, Canada (76.3° N, 93.0° W: paleocoordinates 5.6° N, 34.2° W)

• coordinate estimated from map

When: Amorphognathus ordovicicus Local-Range Zone conodont zone, Lower Member (Allen Bay Formation), Ashgill to Ashgill (449.5 - 427.4 Ma)

Environment/lithology: lithified limestone

• At section B (Fig. 2), the lower and upper parts of the Lower Member, Allen Bay Formation, are composed of limestone and dolostone, respectively, with a total thickness of 357 m. The Middle and Upper members of the formation are separated by a 35 m thick interfingering unit of dark grey and black shale of the Cape Phillips Formation. These members are 301 and 279 m in thickness, respectively, and each consists of a lower reefal facies limestone and an upper transitional facies limestone.


Size class: microfossils

Primary reference: S. Zhang, K. Mirza, and C. R. Barnes. 2016. Upper Ordovician – Upper Silurian conodont biostratigraphy, Devon Island and southern Ellesmere Island, Canadian Arctic Islands, with implications for regional stratigraphy, eustasy, and thermal maturation. Canadian Journal of Earth Sciences 53(9):931-949 [E. Jarochowska/S. Haegele]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 188188: authorized by Emilia Jarochowska, entered by Sarah Haegele on 24.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Conodontophorida -
Pseudobelodina ? dispansa Glenister 1957 conodont
Subspecies"Pseudobelodina vulgaris vulgaris"
 Belodellida - Belodellidae
Walliserodus curvatus Branson and Branson 1947 conodont
 Panderodontida - Panderodontidae
Panderodus unicostatus Branson and Mehl 1933 conodont
 Prioniodontida - Balognathidae
Amorphognathus ordovicicus Bergström and Bergström 1996 conodont
  - Strachanognathidae
Pseudooneotodus beckmanni Bischoff and Sannemann 1958 conodont
 Protopanderodontida -
Drepanoistodus suberectus Branson and Mehl 1933 conodont