http://earthwise-staging.bgs.ac.uk/index.php?action=history&feed=atom&title=Chalk_Biozone_4_-_Litosphaeridium_siphoniphorum
Chalk Biozone 4 - Litosphaeridium siphoniphorum - Revision history
2026-04-14T15:58:34Z
Revision history for this page on the wiki
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http://earthwise-staging.bgs.ac.uk/index.php?title=Chalk_Biozone_4_-_Litosphaeridium_siphoniphorum&diff=1548&oldid=prev
Dbk at 14:32, 27 September 2013
2013-09-27T14:32:24Z
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 15:32, 27 September 2013</td>
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Dbk
http://earthwise-staging.bgs.ac.uk/index.php?title=Chalk_Biozone_4_-_Litosphaeridium_siphoniphorum&diff=1547&oldid=prev
Dbk: Created page with " '''Age:''' Earliest Turonian. '''Macrofaunal correlation''': The ''W. devonense ''and'' F. catinus'' zones (= the ''W. coloradoense'' Zone. '''Definition:''' The interv..."
2013-09-27T14:32:18Z
<p>Created page with " '''Age:''' Earliest Turonian. '''Macrofaunal correlation''': The ''W. devonense ''and'' F. catinus'' zones (= the ''W. coloradoense'' Zone. '''Definition:''' The interv..."</p>
<p><b>New page</b></p><div><br />
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'''Age:''' Earliest Turonian.<br />
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'''Macrofaunal correlation''': The ''W. devonense ''and'' F. catinus'' zones (= the ''W. coloradoense'' Zone.<br />
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'''Definition:''' The interval between the LAD of ''Wrevittia'' ''cassidata'' to the LAD of ''Litosphaeridium siphoniphorum.''<br />
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'''Comments:''' The distinctive species ''Litosphaeridium siphoniphorum ''apparently became extinct close to the Cenomanian-Turonian boundary (Costa & Davey, 1992; Foucher & Monteil, 1998). An alternative marker for the top of this Biozone is the FAD of ''Florentinia clavigera'' (see Foucher & Monteil, 1998).<br />
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'''Lithostratigraphical correlation:''' The lower Holywell Nodular Chalk Formation (Southern Province), the Welton Chalk Formation (Northern Province) and the Herring Formation (North Sea).<br />
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[[category:Palynological zonation | 004]]</div>
Dbk