Chalk Group Lithostratigraphy: Northern England - Chalk Hill Marls: Revision history

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10 October 2013

  • curprev 12:1412:14, 10 October 2013‎ Dbk talk contribs‎ 1,202 bytes +1,202‎ Created page with "A group of three closely spaced (occupying a c. 0.25 m interval) thin marls (5-10 mm thick) that mark the top of the ''Mytiloides''-rich shell detrital chalk of the basal Welt..."
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