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Houghton Regis Marl Lakes is a 20.1-hectare (50-acre) biological Site of Special Scientific Interest in Houghton Regis in Bedfordshire. It was notified under the Wildlife and Countryside Act 1981 in 1988. [1] [2] The site is a large disused chalk quarry, and it is listed by Geo-East as a "Chalk Place to Visit" due to its exposure of Totternhoe ...
Chalk mining is the extraction of chalk from underground and above ground deposits by mining. [1] Mined chalk is used mostly to make cement and bricks . Chalk mining was widespread in Britain in the 19th century because of the large amount of construction underway (and the Industrial Revolution ). [ 2 ]
Eaton Chalk Pit is a 0.16-hectare (0.40-acre) biological Site of Special Scientific Interest on the southern outskirts of Norwich in Norfolk, England. [ 1 ] [ 2 ] These former chalk mines are used by hibernating bats and the site has been monitored over a long period for research into bat ecology.
The caves were used between 1830 and the 1860s for producing lime. The 25-inch to a mile (approx 1:2,500) Ordnance Survey map of 1862–63 describes the place as a "chalk pit" and marks an "engine house" and two remaining kilns. [9] A further investigation produced, among other evidence, a letter from the son of one of the workers. [10]
This disused chalk pit exposes a series of phosphate-rich chalk layers deposited 80 million years ago, during the Upper Cretaceous, under a warm sea which then covered a large part of Europe. The sediments provide evidence of severe earth movements in the area [ 185 ] and they are rich in macrofossils , especially belemnites .
Burning chalk stone was performed in simple kilns in close proximity to where the chalk was found. Lime kilns were made by digging a round hole, three metres wide, two and a half metres deep. After the hole was dug, the chalk and fuel for a fire would be brought to it. Stones of chalk (limestone) would be arranged in a circular dome in the pit.
Purfleet Chalk Pits is a 10.7-hectare (26-acre) geological Site of Special Scientific Interest in Purfleet in Essex. [1] [2] It is a Geological Conservation Review site.[3]The chalk pits expose sands and gravels which are associated with the ancient course of the River Thames.
Sundon Chalk Quarry is a 26.2-hectare (65-acre) biological Site of Special Scientific Interest in Upper Sundon in Bedfordshire. It was notified in 1989 under Section 28 of the Wildlife and Countryside Act 1981, and the local planning authority is Central Bedfordshire Council. [1] [2] The site is privately owned but there is free public access. [3]
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