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The Woburn Sands Formation is a geological formation in England. Part of the Lower Greensand Group, it is the only unit of the group where it occurs, and thus is sometimes simply referred to as the 'Lower Greensand' in these areas. It was deposited during the late Aptian to early Albian stages of the Early Cretaceous.
North and west of London – including Cambridgeshire, Bedfordshire and Buckinghamshire – it is referred to as the Woburn Sands Formation. In Oxfordshire it is known as the Faringdon Sand. In North Wiltshire as the Calne Sands Formation and in parts of Wiltshire, Oxfordshire and Buckinghamshire as the Seend Ironstone Formation.
Lower Greensand Group / Faringdon Sand Formation: Cretaceous: Lower Greensand Group / Ferruginous Sands: Cretaceous: Lower Greensand Group / Folkestone Formation: Cretaceous: Lower Greensand Group / Hythe Formation: Cretaceous: Lower Greensand Group / Sandgate Formation: Cretaceous: Lower Greensand Group / Woburn Sand Formation: Cretaceous ...
Woburn Sands (/ ˈ w oʊ b ər n /) is a town that straddles the border between Buckinghamshire and Bedfordshire in England, and is part of the Milton Keynes urban area. [2] The larger part of the town is in Woburn Sands civil parish, which is in the City of Milton Keynes, [3] Smaller parts of the town are in the neighbouring parishes of Aspley Guise and Aspley Heath (in Central Bedfordshire). [1]
Greensand or green sand is a sand or sandstone which has a greenish color. This term is specifically applied to shallow marine sediment that contains noticeable quantities of rounded greenish grains. These grains are called glauconies and consist of a mixture of mixed-layer clay minerals, such as smectite and glauconite. Greensand is also ...
The Hastings Beds are divided into three formations: Tunbridge Wells Sand Formation 130–400 ft; Wadhurst Clay Formation 100–230 ft, shales with bands of sandstone and iron ore; and the Ashdown Formation 160–700 ft; sandstones. The Fairlight Clays form the upper part of the Ashdown Formation; grey and varigated shales.
The formation is lithologically similar to the Ashdown Formation and comprises complex cyclic sequences of siltstones with sandstones and clays, typically fining upwards. In the western parts of the county the Tunbridge Wells Sands can be divided into three; the Lower Tunbridge Wells Sand, the Grinstead Clay, and the Upper Tunbridge Wells Sand.
The Lambeth Group is a stratigraphic group, a set of geological rock strata in the London and Hampshire basins of southern England.It comprises a complex of vertically and laterally varying gravels, sands, silts and clays deposited between 56-55 million years before present during the Ypresian age (lower Eocene).