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The Sirius Passet Lagerstätte of North Greenland: a remote window on the Cambrian Explosion
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-6720-7418
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2019 (English)In: Journal of the Geological Society, ISSN 0016-7649, E-ISSN 2041-479X, Vol. 176, p. 1023-1037Article in journal (Refereed) Published
Abstract [en]

The lower Cambrian Lagerstätte of Sirius Passet, Peary Land, North Greenland, is one of the oldest of the Phanerozoic exceptionally preserved biotas. The Lagerstätte evidences the escalation of numbers of new body plans and life modes that formed the basis for a modern, functionally tiered ecosystem. The fauna is dominated by predators, infaunal, benthic and pelagic, and the presence of abundant nekton, including large sweep-net feeders, suggests an ecosystem rich in nutrients. Recent discoveries have helped reconstruct digestive systems and their contents, muscle fibres, and visual and nervous systems for a number of taxa. New collections have confirmed the complex combination of taphonomic pathways associated with the biota and its potentially substantial biodiversity. These complex animal-based communities within the Buen Formation were associated with microbial matgrounds, now preserved in black mudstones deposited below storm wave base that provide insight into the shift from late Neoproterozoic (Ediacaran) to Cambrian substrates and communities. Moreover, the encasing sediment holds important data on the palaeoenvironment and the water-column chemistry, suggesting that these animal-based communities developed in conditions with very low oxygen concentrations.

Place, publisher, year, edition, pages
2019. Vol. 176, p. 1023-1037
Keywords [en]
Greenland Cambrian Lagerstätte
National Category
Natural Sciences
Research subject
Diversity of life
Identifiers
URN: urn:nbn:se:nrm:diva-3453DOI: 10.1144/jgs2019-043OAI: oai:DiVA.org:nrm-3453DiVA, id: diva2:1374611
Funder
Swedish Research Council, 440937Available from: 2019-12-02 Created: 2019-12-02 Last updated: 2019-12-02Bibliographically approved

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