"The base of the Dowsing Formation is defined by a sharp downward change from red-brown mudstones, with dolomite and evaporite interbeds, to the sandstone-dominated sequence of the underlying Bunter Sandstone Formation. This boundary corresponds to an abrupt decrease in gamma-ray values and an increase in velocity. The boundary is an angular unconformity at which the Dowsing Formation oversteps beds within the Bunter Sandstone Formation."@en . . "Dowsing Formation"@en . "The Dowsing Formation consists largely of mudstones but a significant amount of bedded halite is present, mostly concentrated in the widespread Röt Halite Member, near the base of the formation, and in the less extensive Muschelkalk Halite Member in the higher part of the formation. The mudstones are red, red-brown, orange-red and green, and silty in part; thin beds of anhydrite occur and beds of grey to buff coloured dolomite are more prominent than in the overlying Dudgeon Formation."@en . "DWDL"@en . "237.0"^^ . . "Mudstone with subsidiary anhydrite-stone, dolostone and halite-stone. Stratified bedrock. Occurs offshore. Deposited during the Anisian Age - to - Ladinian Age (Triassic Period) (246.7-237 Ma BP)."@en . "The top of the Dowsing Formation is placed at a downward change from Dudgeon Formation mudstones, with silty interbeds, thin anhydrites, dolomites and traces of halite, to a sequence in which rather similar mudstones are distinguished by more numerous and prominent beds of grey and buff coloured dolomite. The boundary corresponds to a downhole decrease in gamma-ray values and an increase in velocity at a regionally consistent logmarker that is slightly below the level selected by Rhys (1974) in the type section (49/21-2)."@en . "Dowsing Dolomite Formation [Obsolete: use DWDL]"@en . "The Dowsing Formation is more than 200 m thick over a large part of the UK Southern North Sea and has a maximum thickness of 420 m in the southeastern part of Quadrant 43. The formation is partially eroded around the basin margins (Cameron, 1993)."@en . . "Helsby Sandstone Formation"@en . . . . . "246.7"^^ . . "stable"@en . . "Dowsing Formation"@en . .