In geology, the Bagshot Beds are a series of sands and clays of shallow-water origin, some being fresh-water, some marine. They belong to the upper Eocene formation of the London and Hampshire basins, [1] in England and derive their name from Bagshot Heath in Surrey. They are also well developed in Hampshire, Berkshire and the Isle of Wight ...

The Bagshot Sands are the shallow-water and western equivalents of the great Nummulitie Formation, which is repre- sentedin the east by the thick Nummulite-limestones, deposited in the open ocean of the period.

Most of the Bagshot Formation is composed of pale yellow-brown to pale grey or white, locally orange or crimson, fine- to coarse-grained sand that is frequently micaceous and locally clayey, with sparse glauconite and sparse seams of gravel.

The familiar Claygate Beds which intervene between the London Clay and the Bagshot Sands in the area round London have a distinctive and quite unmistakable lithology, reminis- cent of that of the Lingula Flags, when due allowance is made for the difference in age.

The Bagshot Sands - Volume 4 Issue 8. Please list any fees and grants from, employment by, consultancy for, shared ownership in or any close relationship with, at any time over the preceding 36 months, any organisation whose interests may be affected by the publication of the response.

Lying on top of the London Clay is a sandy clay called the Claygate Beds. Above this is a delightful, fine-grained yellow sand called Bagshot Sand which indicates a shallowing of this sea. It formerly covered the whole region but erosion has now reduced it to isolated patches on hill tops in central Essex.

In places, the Claygate Beds are capped by a deep layer of sand, known as Bagshot Sand. This covers some of the highest parts of the Forest, such as the High Beach area and Loughton Camp. The Bagshot Sand is itself mostly covered by a thin layer of pebbly gravel.

Bagshot Formation caps the highest ground in the district, mainly in the north-east and occurs as isolated outliers in central London and the south-west of the district (Figure 27); it gives rise to steep convex slopes up to 12°. It is characteristically free draining, and where undisturbed by development supports a typically heathland vegetation.

2020年5月8日 · Spring lines are governed by geology and occur where a clay rich layer is overlain by a sandier layer. At the top of Hampstead heath are the Bagshot Sands, laid down close to the cost about 50 million years ago. Rainwater percolates through the sands until it meets with the more clayey Claygate Beds beneath.

1980年1月1日 · In 1971 the IGS Stock Borehole penetrated the full sequence of Bagshot Beds, Claygate Beds and London Clay. The IGS Sandpit Hill Borehole, Hadleigh, in southern Essex, provided in 1973 a second sequence through most of this succession and a broad lithological correlation proved possible between the two boreholes.