"Fen Farm Limestones Bed"@en . . "FFML"@en . "Fen Farm Limestone [Obsolete: use FFML]"@en . . "Limestone and mudstone. Stratified bedrock. Occurs onshore. Deposited during the Sinemurian Age (Jurassic Period) (199.5-192.9 Ma BP)."@en . . "stable"@en . . . "1.39 m in type section; up to 2 m in Leicestershire."@en . "192.9"^^ . . . "Fen Farm Limestones Bed"@en . "Change up into bluish grey, shaly mudstone of the undifferentiated Buckingham Member; at 56.75 m depth in type section Fulbeck Airfield Borehole F/B5 (SK95SW/17)."@en . "199.5"^^ . . . "Group of about three thin (0.1 to 0.3 m) limestone beds, separated by up to 0.5m of calcareous mudstone beds. Limestones are bioclastic packstone/grainstone, shelly, grey, weathering pale orange brown. Fauna includes bivalves, echinoderms, ammonites, corals and the trace fossil Kulindrichnus. Whole Gryphaea shells and crinoid (Pentacrinus) debis abundant on the outcrop. Forms a strong feature with a broad dip slope."@en . "Change up from grey, calcareous mudstone of the undifferentiated Granby Member; at 58.14 m depth in type section Fulbeck Airfield Borehole F/B5 (SK95SW/17)."@en .