Sciponoceras gracile Zone: Revision history

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26 September 2013

  • curprev 15:0415:04, 26 September 2013‎ Dbk talk contribs‎ 1,252 bytes +1,252‎ Created page with "This zone is only currently used in northern England (Whitham, 1991), and in some areas has in part been replaced by the standard ammonite zonal equivalents (= ''M. geslinianu..."
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