Yans, J.; Corfield, Richard; Racki, G. and Preat, A.
|DOI (Digital Object Identifier) Link:||http://doi.org/10.1017/S0016756806003037|
|Google Scholar:||Look up in Google Scholar|
New carbon isotopic data from the Devonian of Ardennes (Belgium) and partly from the Holy Cross Mountains (Poland) highlight an abrupt and high-amplitude negative excursion in the punctata conodont Zone. Published information from Moravia and China suggests that this Middle Frasnian negative excursion, jointly with the preceding large-scale positive shift, should be used as a global chemostratigraphic marker. Causation scenarios for this negative 'punctata Event' are correlated neither with major biota turnover nor major sea-level changes, but may be related to: (1) the Alamo Impact Event, that led to (2) the massive dissociation of methane hydrates and (3) the rapid onset of global warming.
|Item Type:||Journal Article|
|Keywords:||punctata Event; Frasnian; Carbon isotopes; Ardennes; Belgium;|
|Academic Unit/Department:||Science > Environment, Earth and Ecosystems
|Depositing User:||Colin Smith|
|Date Deposited:||09 Apr 2009 08:47|
|Last Modified:||15 Jan 2016 11:08|
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