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Distribution of micro fossil groups across the Wenlock Shelf of the Welsh Basin
Silurian acritarch distribution in the Ludlovian shelf sea of South Wales and the Welsh
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abundant acritarchs Albian ammonite ammonite Subzone Aptian Atlantic Barremian Bathonian benthic benthonic biofacies biostratigraphy Bolivina borehole calcareous carapace carbonate Cassidulina Celtic Sea Celtic Sea Basin Cenomanian chalk characterised chitinozoa clay conodont continental correlation COST G-2 Cretaceous Cushman d'Orbigny Dahomey Embayment Damotte deposits dinoflagellates distribution dominated Elphidium England English Channel environment environmental Eocene estuary facies feet fissicostis foraminifera forms fossil Gbicides genera genus Geol Geology Gnathodus interval Jones Jurassic Kaye late lateral view left valve Limestone lobatulus lower marine Marls microfossils Mudstone Namurian Neocythere North Celtic Sea number of species occur Oertli offshore ostracod ostracod zone Paleocene phosphatic beds planktonic present recognised reef Reuss right valve right view salinity samples sands Santonian Schuleridea sediments sequence shales shallow water shelf sea southern specimens stations stratigraphic surface temperature tidal Triassic Turonian upper Warrington water depth water masses Wenlock Limestone Formation Woolhope