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TitleTerrestrial to marine transitions recorded in invertebrate trace fossils of the Joggins Formation
AuthorDafoe, LORCID logo; Stimson, M; Gibling, M
SourceJoggins Research Symposium [program and abstracts]; 2018 p. 9
LinksOnline - En ligne (complete volume - volume complet, pdf, 1.87 MB)
Alt SeriesNatural Resources Canada, Contribution Series 20180266
PublisherAtlantic Geoscience Society
MeetingJoggins Research Symposium; Joggins, NS; CA; September 22, 2018
Mediapaper; on-line; digital
File formatpdf
ProvinceNova Scotia
AreaJoggins; Chignecto Bay
Lat/Long WENS -64.5000 -64.4167 45.7500 45.6667
Subjectspaleontology; stratigraphy; sedimentology; depositional environment; fossils; invertebrates; trace fossils; ichnology; ichnofossils; sedimentary facies; Joggins Formation; Joggins Fossil Cliffs UNESCO World Heritage Site; Phanerozoic; Paleozoic; Carboniferous
ProgramGSC Atlantic Division
Released2018 09 01
AbstractThe Joggins Fossil Cliffs, a renowned Carboniferous UNESCO World Heritage Site, is found along the shores of Chignecto Bay, Nova Scotia. This spectacular outcrop has a well-established stratigraphy with 14 cycles comprising alternations between open-water, poorly drained floodplain and well-drained floodplain facies assemblages. The ichnology of the formation has been previously studied; however, the majority of the trace fossils identified primarily include surface trails and vertebrate trackways, resulting in a limited record of infaunal activity. Analyses of primarily invertebrate trace fossils from both the Joggins Fossil Cliffs and approximately 700 m of Joggins Formation onshore core (REI B2-1) provide further documentation of the trace fossil record for these Carboniferous rocks. The diverse suite of traces includes: Acanthichnus, Arenicolites, Beaconites, Chondrites, Cochlichnus, Diplichnites, Diplocraterion, Diplopodichnus, fugichnia, Gordia, Haplotichnus, Kouphichnium, Limulichubichnus, Lingulichnus, Palaeophycus, Phycosiphon, Planolites, Protichnites, Rhizocorallium, Skolithos, Stiaria, Teichichnus, Thalassinoides, Treptichnus, Undichnia, tunnel and chamber structures, plausible wood borings, and rhizoliths. A number of these traces fossils have not been previously recognized from the formation and reflect the work of annelids, arthropods, fish and molluscs. Combining the trace fossil record with the sedimentological framework provides a robust approach in interpreting depositional settings. Within alluvial plain to fluvial channel margin settings, the trace fossil suites include both the Skolithos and Scoyenia Ichnofacies. In marine-influenced strata including bayhead delta and brackish bay settings, trace fossil suites reflect proximal to archetypal Cruziana Ichnofacies and include some strictly marine trace fossils such as Chondrites and Phycosiphon.
Summary(Plain Language Summary, not published)
The Joggins Fossil Cliffs of Nova Scotia are a renowned Carboniferous-aged UNESCO World Heritage Site. The trace fossil record of preserved animal activity for infaunal invertebrate organisms is poorly understood. The trace fossils of the cliffs and a related core interval from the onshore were analyzed and found to contain a diverse suite of surface trails and infaunal burrows, some previously unrecognized. This work aids in interpreting paleodepositional environments and builds the knowledgebase for an important geological unit in Canada.

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