Development of early Palaeozoic ichnofabrics: evidence from shallow marine siliciclastics
Abstract
Earliest Cambrian fine-grained sediments appear to have been firm close to the sediment-water interface. As a result there was a high preservational potential of shallow tiers. There is limited evidence for a mixed layer at this time; rather, most of the preserved trace fossils were open burrows. Later in the Cambrian, depth of sediment mixing increased but firmground conditions are still found relatively close to the sediment-water interface. The development of the mixed layer and properties of Cambrian muddy sediments have numerous stratigraphic and ichnological consequences. These include secular trends in the preservation of event beds and shallow-tier trace fossils including Rusophycus and Cruziana .
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Isolated vertically oriented trace fossils are rare in the Fortunian, being present in silty and muddy firmgrounds rather than in moderate- to high-energy shifting sands.
“Isolated vertically oriented trace fossils are rare, being present in silty and muddy firmgrounds rather than in moderate- to high-energy shifting sands [38].”
From Decoupling of body-plan diversification and ecological structuring during the Ediacaran–Cambrian transition: evolutionary and geobiological feedbacks (2014) · cites this paper as [38]
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The Chengjiang Biota inhabited a deltaic environment
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- Authors
- Droser, M. L., Jensen, S., & Gehlîng, J. G.
- Affiliations
- University of California, Riverside (US)
- Department of Earth Sciences University of California Riverside, CA 92521, USA
- South Australian Museum (AU)
- Venue
- Geological Society, London, Special Publications
- Publisher
- Geological Society of London
- Published
- 2004-01
- Volume
- 228
- Issue
- 1
- Pages
- 383-396
- ISSN
- 0305-8719 (ISSN-L)
- 2041-4927
- OpenAlex
- W2053584208
- Cited by
- 39
- References
- 4
- Citations by year
- 2024: 3 · 2022: 1 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 4 · 2015: 1 · 2014: 3 · 2013: 1 · 2012: 5
- FWCI
- 1.13
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geological Society London Special Publications (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Earth-Surface Processes › Geological formations and processes
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Keywords
- trace fossils, Cambrian, sediment-water interface, sediment mixing, mixed layer, Rusophycus, Cruziana, event beds, trace fossil preservation
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