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The Lower Greensand as a broad zone between the brick-patterned chalk (a type of limestone) and the interior large c-shape Weald Clay. Many towns shown are on the Lower Greensand. The Lower Greensand Group is a geological unit present across large areas of Southern England. It was deposited during the Aptian and Albian ages of the Early ...
The formation of Carboniferous Limestone was followed by the deposition of dark marine shales, siltstones and coarse sandstones of the Millstone Grit, notably in the area later uplifted to form the Pennine anticline. This sequence can be seen in the Yorkshire Dales with Ingleborough protruding up above the Carboniferous Limestone landscape below.
A sheet of mainly Jurassic limestone fan gravel probably covered most of the vale in the past but has since been eroded away leaving isolated deposits, most notably the Cheltenham Sand, which forms a well-draining light soil in the Cheltenham-Gloucester region. Inferior oolite exposed below Crickley Hillfort on the edge of the Cotswold ...
The solubility of the limestone in weakly acidic water has resulted in the development of a wide range of surface karst features such as limestone pavements, dry valleys, sinkholes and resurgences along with very extensive cave networks including the Three Counties System which, with over 86km of known passage, is the longest in the UK. [9]
The name Cornbrash is an old English agricultural name applied in Wiltshire to a variety of loose rubble or brash which, in that part of the country, forms a good soil for growing corn. The name was adopted by William Smith for a thin band of shelly limestone which, in the south of England, breaks up in the manner indicated.
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Locally sourced limestone has been used in the construction of the castles at Carew, Manorbier and Pembroke. Significant coastal limestone quarries were also active at Lydstep and Caldey. [10] Slate was quarried at Caersalem Quarry at Porthgain and exported via the village harbour. Many older buildings and field walls have been constructed from ...
Map of Buxton's limestone quarries and freight railways The Buxton lime industry has been important for the development of the town of Buxton in Derbyshire, England, and it has shaped the landscape around the town. Geology The White Peak area of the Peak District is named after the limestone plateau landscape of the ' Derbyshire Dome '. This limestone outcrop is surrounded by a horseshoe ...