{ { Metal Age Deposits } { Recent { Neolithic " } Superficial Deposits { Pleistocene { Palaeolithic " } { { Glacial " } { { { Cromer Series } T { { Weybourne Crag } E { Pliocene { Chillesford and Norwich } Sands chiefly R { { Crags } T { { Red and Walton Crags } I { { Coralline Crag } A { R { Miocene Absent from Britain Y { { { Fluviomarine Beds of } { { Hampshire } { { Bagshot Beds } { Eocene { London Clay } Clays and Sands chiefly { { Oldhaven Beds, Woolwich } { { and Reading Groups } { { Thanet Sands } { { Chalk } { { Upper Greensand and Gault} Chalk at top { Cretaceous { Lower Greensand } Sandstones, Mud and { { Weald Clay } Clays below { { Hastings Sands } { { { Purbeck Beds } S { { Portland Beds } E { { Kimmeridge Clay } C { { Corallian Beds } O { { Oxford Clay and } Shales, Sandstones and N { { Kellaways Rock } Oolitic Limestones D { Jurassic { Cornbrash } A { { Forest Marble } R { { Great Oolite with } Y { { Stonesfield Slate } { { Inferior Oolite } { { Lias--Upper, Middle, } { { and Lower } { { { Rhaetic } { { Keuper Marls } { { Keuper Sandstone } Red Sandstones and { Triassic { Upper Bunter Sandstone } Marls, Gypsum and Salt { { Banter Pebble Beds } { { Lower Bunter Sandstone }
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