Chalk Group Lithostratigraphy: Northern England - Croxton Marl: Revision history

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10 October 2013

  • curprev 11:1911:19, 10 October 2013Dbk talk contribs 583 bytes +583 Created page with "Up to 10 mm thick marl, midway between the Grasby Marl and Barton 1 Marl, locally with small closely spaced burrow-form flints beneath, and typically marked by an overhang in ..."