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Sedimentology of SP...
Sedimentology of SPICE (Steptoean positive carbon isotope excursion): A high-resolution trace fossil and microfabric analysis of the middle to late Cambrian Alum Shale Formation, southern Sweden
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- Egenhoff, Sven O. (författare)
- Colorado State University
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- Fishman, Neil S. (författare)
- United States Geological Survey Western Region,Hess Corporation
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- Ahlberg, Per (författare)
- Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science
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- Maletz, Jörg (författare)
- Free University of Berlin
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- Jackson, Allison (författare)
- Colorado State University
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- Kolte, Ketki (författare)
- Colorado State University
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- Lowers, Heather (författare)
- United States Geological Survey Western Region
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- Mackie, James (författare)
- United States Geological Survey Western Region
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- Newby, Warren (författare)
- Occidental Petroleum Corporation,Colorado State University
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- Petrowsky, Matthew (författare)
- Colorado State University
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(creator_code:org_t)
- Geological Society of America, 2015
- 2015
- Engelska 16 s.
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Ingår i: Geological Society of America. Special Papers. - : Geological Society of America. - 0072-1077. ; 515, s. 87-102
- Relaterad länk:
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http://dx.doi.org/10...
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Cambrian Alum Shale Formation in the Andrarum-3 core from Scania,southern Sweden, consists of black siliciclastic mudstone with minor carbonate intercalations. Four facies comprise three siliciclastic mudstones and one fine-grained carbonate. The facies reflect deposition along a transect from deep ramp to basin on a Cambrian shelf. The three mudstone facies contain abundant clay clasts and laterally variable siltstone laminae. Bed-load transport processes seem to have dominated deposition on this deep shelf. These sedimentary rocks record mainly event deposition, and only relatively few, thin laminae probably resulted from suspension settling. The Alum Shale Formation deep shelf did not show a bioturbation gradient, but fecal strings are common and Planolites burrows are rare in all mudstone facies. Evidence for biotic colonization indicates that this mudstone environment was not persistently anoxic, but rather was most likely intermittently dysoxic. The Alum Shale Formation in the Andrarum-3 core shows an overall decrease of grain size, preserved energy indicators, and carbonate content upsection interpreted to reflect a deepeningupward. The succession can also be divided into four small-scale fining-upwardcycles that represent deepening, and four overlying coarsening-upward cycles that represent upward shallowing.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
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- art (ämneskategori)
- ref (ämneskategori)
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Egenhoff, Sven O ...
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Fishman, Neil S.
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Ahlberg, Per
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Maletz, Jörg
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Jackson, Allison
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Kolte, Ketki
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visa fler...
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Lowers, Heather
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Mackie, James
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Newby, Warren
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Petrowsky, Matth ...
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visa färre...
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- NATURVETENSKAP
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