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Sedimentology of th...
Sedimentology of the Lower Ordovician (upper Tremadocian) Bjørkasholmen Formation at Flagabro, southern Sweden
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- Egenhoff, Sven (author)
- Colorado State Univ, Dept Geosci, Ft Collins, CO 80523 USA,Colorado State University
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- Maletz, Jörg (author)
- Free Univ Berlin, Inst Geowissensch, Berlin, Germany,Free University of Berlin
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- Ahlberg, Per (author)
- Lund University,Lunds universitet,Geologiska institutionen,Naturvetenskapliga fakulteten,Department of Geology,Faculty of Science
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- Mast, Allison (author)
- Colorado State Univ, Dept Geosci, Ft Collins, CO 80523 USA,Colorado State University
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- Frisk, Åsa (author)
- Uppsala University,Uppsala universitet,Evolutionsmuseet
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- Ebbestad, Jan Ove R., 1967- (author)
- Uppsala University,Uppsala universitet,Evolutionsmuseet
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- Newby, Warren (author)
- Colorado State Univ, Dept Geosci, Ft Collins, CO 80523 USA;Total Oil & Gas, Houston, TX 77010 USA,Colorado State University
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(creator_code:org_t)
- 2018-05-14
- 2018
- English.
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In: GFF. - : TAYLOR & FRANCIS LTD. - 1103-5897 .- 2000-0863. ; 140:1, s. 55-65
- Related links:
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The Lower Ordovician Bjørkasholmen Formation at Flagabro, Scania, southern Sweden, consists of a 0.8m thick succession of carbonates with three siliciclastic mudstones, 5, 1 and 100mm thick, intercalated in the central part of the unit. Carbonate and siliciclastic mudstone beds show both normal and inverse grading. The carbonates are mud-rich and subdivided into a mudstone, a wackestone and a packstone facies. Grain types in the carbonates are mostly shells and shell fragments of brachiopods and trilobites. The carbonate rocks are strongly bioturbated seen as in roundish burrows filled with mud and a clear cement; additionally, bioturbation is reflected in the random orientation of shells. The siliciclastic mudstones are subdivided into two facies; one contains large amounts of shells and is in part grain-supported, the other is matrix-dominated and laminated to massive. The succession reflects sedimentation on a low-inclined shelf equivalent to a mid-ramp to basinal setting. Most mud- and wackestones (facies 3 and 4) represent fair-weather sedimentation, and the intercalated wacke- and packstones (facies 4 and 5) represent concentration of shell debris during high-energy storm. The siliciclastic mudstones in the central part of the succession reflect deposition in a basinal setting. The entire BjOrkasholmen Formation at Flagabro is equivalent to a lowstand of third (?) order without a well-developed internal cyclicity and is in that respect similar to the Bjørkasholmen Formation of oland, but different from the age-equivalent Norwegian sections.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Keyword
- Bjørkasholmen Formation
- carbonates
- siliciclastic mudstones
- Flagabro
- Bjørkåsholmen Formation
- carbonates
- Flagabro
- siliciclastic mudstones
Publication and Content Type
- ref (subject category)
- art (subject category)
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