Uintacrinus socialis Zone: Revision history

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26 September 2013

  • curprev 12:1612:16, 26 September 2013Dbk talk contribs 3,782 bytes +3,782 Created page with "'''Base''': In southern England, the base of the zone is marked by Buckle Marl 1, and in northern England, it is defined by the first appearance of the index species, c. 9.5 m..."