Calcification patterns of Rivularia-type cyanobacteria: examples from the Miocene of the North Alpine Foreland Basin
During the Middle Miocene, an extensive lake district existed along the southern margin of today’s Swabian Alb (Baden–Württemberg). Sediments include a wide range from marls to pure carbonates of lacustrine and palustrine origin that contain microbialites studied here. These sediments are part of th...
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| Veröffentlicht in: | Facies 2022-10, Vol.68 (4), Article 16 |
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| description | During the Middle Miocene, an extensive lake district existed along the southern margin of today’s Swabian Alb (Baden–Württemberg). Sediments include a wide range from marls to pure carbonates of lacustrine and palustrine origin that contain microbialites studied here. These sediments are part of the Obere Süßwassermolasse known as Silvana Beds. Macroscopically the studied microbialites show a distinctive layering with an alternation of whitish and tan-colored layers. Petrographic thin sections as well as SEM studies reveal a microstructure of the microbialites comprising an unbranched filament zone formed by erect and parallel calcified filaments as well as a zone of branching filaments forming shrubs of the
Dichothrix
morphotype. We define two patterns of mineralization for the studied microbialites: (1) shape-retentive mineralization: successive carbonate precipitation along the filament surface. (2) shape-obscuring mineralization: clusters of clotted micritic precipitates along and within the vicinity of micro-sparitic tubules that probably represent remains of the former cyanobacterial sheaths. |
| doi_str_mv | 10.1007/s10347-022-00654-3 |
| format | Article |
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Dichothrix
morphotype. We define two patterns of mineralization for the studied microbialites: (1) shape-retentive mineralization: successive carbonate precipitation along the filament surface. (2) shape-obscuring mineralization: clusters of clotted micritic precipitates along and within the vicinity of micro-sparitic tubules that probably represent remains of the former cyanobacterial sheaths.</description><identifier>ISSN: 0172-9179</identifier><identifier>EISSN: 1612-4820</identifier><identifier>DOI: 10.1007/s10347-022-00654-3</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Biogeosciences ; Calcification ; Carbonates ; Colour ; Cyanobacteria ; Earth and Environmental Science ; Earth Sciences ; Ecology ; Filaments ; Geochemistry ; Lakes ; Microstructure ; Mineralization ; Miocene ; Original Article ; Paleontology ; Precipitates ; Sediment ; Sedimentology ; Sediments ; Shape ; Sheaths ; Thin films</subject><ispartof>Facies, 2022-10, Vol.68 (4), Article 16</ispartof><rights>The Author(s) 2022</rights><rights>The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c293t-82946c25a4f6013a7cc8f0a61457cf0a16e77705eb447752ed10bcbbe30fafab3</citedby><cites>FETCH-LOGICAL-c293t-82946c25a4f6013a7cc8f0a61457cf0a16e77705eb447752ed10bcbbe30fafab3</cites><orcidid>0000-0003-1154-4161</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10347-022-00654-3$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10347-022-00654-3$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,27901,27902,41464,42533,51294</link.rule.ids></links><search><creatorcontrib>Willmer, Bernd J.</creatorcontrib><creatorcontrib>Rasser, Michael W.</creatorcontrib><title>Calcification patterns of Rivularia-type cyanobacteria: examples from the Miocene of the North Alpine Foreland Basin</title><title>Facies</title><addtitle>Facies</addtitle><description>During the Middle Miocene, an extensive lake district existed along the southern margin of today’s Swabian Alb (Baden–Württemberg). Sediments include a wide range from marls to pure carbonates of lacustrine and palustrine origin that contain microbialites studied here. These sediments are part of the Obere Süßwassermolasse known as Silvana Beds. Macroscopically the studied microbialites show a distinctive layering with an alternation of whitish and tan-colored layers. Petrographic thin sections as well as SEM studies reveal a microstructure of the microbialites comprising an unbranched filament zone formed by erect and parallel calcified filaments as well as a zone of branching filaments forming shrubs of the
Dichothrix
morphotype. We define two patterns of mineralization for the studied microbialites: (1) shape-retentive mineralization: successive carbonate precipitation along the filament surface. 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Dichothrix
morphotype. We define two patterns of mineralization for the studied microbialites: (1) shape-retentive mineralization: successive carbonate precipitation along the filament surface. (2) shape-obscuring mineralization: clusters of clotted micritic precipitates along and within the vicinity of micro-sparitic tubules that probably represent remains of the former cyanobacterial sheaths.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s10347-022-00654-3</doi><orcidid>https://orcid.org/0000-0003-1154-4161</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Biogeosciences Calcification Carbonates Colour Cyanobacteria Earth and Environmental Science Earth Sciences Ecology Filaments Geochemistry Lakes Microstructure Mineralization Miocene Original Article Paleontology Precipitates Sediment Sedimentology Sediments Shape Sheaths Thin films |
| title | Calcification patterns of Rivularia-type cyanobacteria: examples from the Miocene of the North Alpine Foreland Basin |
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