Chalk Group Lithostratigraphy: East Anglia - Upper Orbirhynchia Band: Revision history

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7 October 2013

  • curprev 16:3816:38, 7 October 2013‎ Dbk talk contribs‎ 1,566 bytes +1,566‎ Created page with " Jeans (1980) identified two horizons characterised by an abundance of the brachiopod ''Orbirhynchia mantelliana'' in the Lower Chalk of northern England, named the Lower and..."
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