Chalk Group Lithostratigraphy: Northern England - Maidlands Upper Marls: Revision history

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11 October 2013

  • curprev 12:2812:28, 11 October 2013‎ Dbk talk contribs‎ 642 bytes +642‎ Created page with "A marl pair separated by c. 2.6 m of chalk, the lower one comprising a 20-40 mm thick grey, silty and locally twinning marl, and the upper comprising a 40-50 mm thick chalky a..."
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