The geology of the Wenlock shales around Builth Wells
Detailed field mapping and palaeontological collecting have revealed a complete sequence of Wenlock graptolite biozones around Builth. Bio-stratigraphical work has greatly improved the correlation with other British and European successions. The <i>flexilis</i> Zone, of wider internation...
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University of Cambridge
1987
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233972 |