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- Title
An Arctic Lagerstätte – the Slottsmøya Member of the Agardhfjellet Formation (Upper Jurassic – Lower Cretaceous) of Spitsbergen.
- Authors
Hurum, Jørn H.; Nakrem, Hans A.; Hammer, Øyvind; Knutsen, Espen M.; Druckenmiller, Patrick S.; Hryniewicz, Krzysztof; Novis, Linn K.
- Abstract
Paleontological fieldwork on Spitsbergen, 2004-2011, has revealed the presence of abundant plesiosaur and ichthyosaur remains, a series of 15 seep carbonate bodies, as well as a rich invertebrate fauna from the Upper Jurassic - Lower Cretaceous Slottsmoya Member of the Agardhfjellet Formation, a 70-100 metre-thick unit of dark grey to black shale and paper shale. Deposition of the Slottsmoya Member occurred at high paleolatitudes, at or near the Arctic Circle, and molluscan and foraminiferal biostratigraphy indicates an Early Volgian - Ryazanian age for the unit. In this volume we present the organic carbon isotope chemostratigraphy, cyclostratigraphy, lithostratigraphy and sedimentology for the Member. A well preserved assemblage of fossil echinoderms, the first ultrastructural information on the lingulid brachiopod Lingularia and microfacies of nine seep carbonatesare described. Comparative analyses of the marine reptile material found in the Slottsmoya Member indicate a diverse assemblage of new plesiosaurians (two new genera and three new species of plesiosauroids and one new species of pliosaurid) and ichthyosaurians (two new genera and species). Placed within a high-resolution stratigraphic framework, the diverse invertebrate and vertebrate assemblage of the Slottsmoya Lagerstatte provides an unparallelled opportunity to study the evolution and paleoecology of a high-latitude, Mesozoic, marine ecosystem.
- Subjects
SPITSBERGEN Island (Norway); CYCLOSTRATIGRAPHY; CHEMOSTRATIGRAPHY; PALEOECOLOGY; BRACHIOPODA
- Publication
Norwegian Journal of Geology / Norsk Geologisk Forening, 2012, Vol 92, Issue 2/3, p55
- ISSN
0029-196X
- Publication type
Article