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Silurian carbonate platforms and extinction events - ecosystem changes exemplified from Gotland, Sweden

Calner, Mikael LU (2005) In Facies 51(1-4). p.584-591
Abstract
Recent and ancient carbonate platforms are major marine ecosystems, built by various carbonate-secreting organisms with different sensitivity for environmental change. For this reason, carbonate platforms are excellent sensors for changes in contemporaneous marine environments. A variety of ecosystem changes in carbonate platforms have previously been recognised in the aftermath of mass extinction events. This paper addresses how two Silurian extinction events among graptolites, conodonts, and pentamerid brachiopods can be related to changes in the style of carbonate production and general evolution of low latitude carbonate platforms in a similar way as previously reported from the major five mass extinctions of the Phanerozoic. Strata... (More)
Recent and ancient carbonate platforms are major marine ecosystems, built by various carbonate-secreting organisms with different sensitivity for environmental change. For this reason, carbonate platforms are excellent sensors for changes in contemporaneous marine environments. A variety of ecosystem changes in carbonate platforms have previously been recognised in the aftermath of mass extinction events. This paper addresses how two Silurian extinction events among graptolites, conodonts, and pentamerid brachiopods can be related to changes in the style of carbonate production and general evolution of low latitude carbonate platforms in a similar way as previously reported from the major five mass extinctions of the Phanerozoic. Strata formed on Gotland during the Mulde and Lau events share remarkably many similarities but are strikingly different in composition compared to other strata on the island. The event-related strata is characterised by the sudden appearance of widespread oolites, deviating reef composition, flat-pebble conglomerates, abundant micro-and macro-oncoids, stromatolites, and other microbial facies suggesting decreased bioturbation levels in contemporaneous shelf seas. Importantly, these changes can be tied to high-resolution biostratigraphic frameworks and global stable isotope excursions. The anomalous intervals may therefore be searched for elsewhere in order to test their regional or global significance. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
microbial resurgence, carbonate platform, extinction event, oolite, Gotland, Silurian
in
Facies
volume
51
issue
1-4
pages
584 - 591
publisher
Springer
external identifiers
  • wos:000235005200042
  • scopus:29944444675
ISSN
0172-9179
DOI
10.1007/s10347-005-0050-0
language
English
LU publication?
yes
id
b13e4cf0-85f0-42f6-9002-371f016da27c (old id 209699)
date added to LUP
2007-08-24 13:05:00
date last changed
2017-10-22 04:38:53
@article{b13e4cf0-85f0-42f6-9002-371f016da27c,
  abstract     = {Recent and ancient carbonate platforms are major marine ecosystems, built by various carbonate-secreting organisms with different sensitivity for environmental change. For this reason, carbonate platforms are excellent sensors for changes in contemporaneous marine environments. A variety of ecosystem changes in carbonate platforms have previously been recognised in the aftermath of mass extinction events. This paper addresses how two Silurian extinction events among graptolites, conodonts, and pentamerid brachiopods can be related to changes in the style of carbonate production and general evolution of low latitude carbonate platforms in a similar way as previously reported from the major five mass extinctions of the Phanerozoic. Strata formed on Gotland during the Mulde and Lau events share remarkably many similarities but are strikingly different in composition compared to other strata on the island. The event-related strata is characterised by the sudden appearance of widespread oolites, deviating reef composition, flat-pebble conglomerates, abundant micro-and macro-oncoids, stromatolites, and other microbial facies suggesting decreased bioturbation levels in contemporaneous shelf seas. Importantly, these changes can be tied to high-resolution biostratigraphic frameworks and global stable isotope excursions. The anomalous intervals may therefore be searched for elsewhere in order to test their regional or global significance.},
  author       = {Calner, Mikael},
  issn         = {0172-9179},
  keyword      = {microbial resurgence,carbonate platform,extinction event,oolite,Gotland,Silurian},
  language     = {eng},
  number       = {1-4},
  pages        = {584--591},
  publisher    = {Springer},
  series       = {Facies},
  title        = {Silurian carbonate platforms and extinction events - ecosystem changes exemplified from Gotland, Sweden},
  url          = {http://dx.doi.org/10.1007/s10347-005-0050-0},
  volume       = {51},
  year         = {2005},
}