Schuchert Dal Formation, Jameson Land, East Greenland (Permian of Greenland)

Where: Greenland (72.0° N, 23.0° W: paleocoordinates 28.9° N, 14.5° E)

• coordinate estimated from map

• basin-level geographic resolution

When: Oksedal Member (Schuchert Dal Formation), Zechstein (259.0 - 252.3 Ma)

• The locality shows a transition from the upper Oksedal Member of the Schuchert Dal Formation into the base of the overlying Wordie Creek Formation.

Environment/lithology: marine

• The sediments of the Schuchert Dal Formation and the overlying Wordie Creek Formation were deposited in a narrow, elongate, fault controlled basin. A well oxygenated benthic environment.

•A dramatic change in atmospheric chemistry would call upon an episode of massive volcanic activity that could be responsible for excessive emissions of co2 and or acidifying gasas and their derivative liquid aerosols.

• The Greenland P-Tr record is among the most expanded in the world.

•This area is far enough away from later igneous intrusions that it has suffered no thermal alternation, unlike other localities elsewere.

•Oksedal Member of the Schuchert Dal Formation is composed of bioturbated green/grey, micaceous mud-siltstones and contain a diverse trace fossil assemblage that includes Planolites, Palaeophycus and Rhizocorallium) The overlying dark grey, micaceous and pyretic mud-siltstones of the basal Wordie Creek Formation are generally laminated, except for rare horizons containing sparse Planolites.

Collection methods: quarrying, chemical, mechanical,

Primary reference: C.V. Looy. 2000. The Permian-Triassic Biotic Crisis: collapse and recovery of terrestrial ecosystems. [C. Looy/W. Puijk/W. Puijk]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 31424: authorized by Cindy Looy, entered by Wilma Puijk on 13.05.2003, edited by Cindy Looy

Creative Commons license: CC BY (attribution)

Taxonomic list

• Upper Oksedal Member of the Schuchert Dal Formation (marine)

•Contains a diverse Late Permian invertebrate fauna of brachiopods (Martinia), solitary rugose corals (Calophyllum), ammonoids (Paramexicoceras) and foraminifera (Ammobaculites, Ammodiscus and Glomospira and unidentified nodosariids)

 Ammodiscoidea - Ammodiscidae
Glomospira spp. Rzehak 1895
Ammodiscus spp. Reuss 1862
 Lituolida - Lituolidae
Ammobaculites spp. Cushman 1910
 Life -
Acritarcha indet. Evitt 1963 acritarchs
 Ozarkodinida - Gondolellidae
Neogondolella spp. Bender and Stoppel 1965 conodont
 Spiriferida - Martiniidae
Martinia spp. M'Coy 1844
 Goniatitida - Cyclolobidae
Paramexicoceras spp. Popov 1970 ammonite
 Stauriida - Polycoeliidae
Calophyllum spp. Dana 1846 horn coral
Protohaploxypinus spp. Samoilovitch 1953
Uvaesporites sp. Döring 1965
Weylandites spp. Bharadwaj and Srivastava 1969
 Cupressales - Pinidae
Inaperturopollenites sp. Potonié 1966
Vittatina spp. Wilson 1962