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https://nora.nerc.ac.uk/id/eprint/7900/ Stratigraphical influences on the limestone hydrogeology of the Wye catchment, Derbyshire - NERC... on the stratigraphical influences limestone hydrogeology https://earthwise.bgs.ac.uk/index.php/Stratigraphical_principles,_Carboniferous,_Northern_England Stratigraphical principles, Carboniferous, Northern England - MediaWiki northern england stratigraphical principles carboniferous mediawiki https://rmcg.geociencias.unam.mx/index.php/rmcg/article/view/839 Sedimentological-stratigraphical study of Sierra Las Lilas (Paleozoic) and Sierra El Cartucho... el cartucho sedimentological stratigraphical study sierra