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The Aubrey holes are a ring of 56 chalk pits at Stonehenge, named after seventeenth-century antiquarian John Aubrey. They date to the earliest phases of Stonehenge in the late fourth and early third millennium BC. Despite decades of argument and analysis, their purpose is still unknown, although an astronomical role has often been suggested.
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 ]
Grime's Graves is a large Neolithic flint mining complex in Norfolk, England.It lies 8 km (5.0 mi) north east from Brandon, Suffolk in the East of England.It was worked between c. 2600 and c. 2300 BCE, although production may have continued through the Bronze and Iron Ages and later, owing to the low cost of flint compared with metals.
In the Lion Gorge are the remnants of an old tramway cutting created in the nineteenth century to transport chalk from Lion Pit to the riverside wharves. [4] The tramway ran roughly south from the chalk diggings to the Lion Works – a Portland cement factory opened in 1874. (Until about 1980, Thurrock was a major centre for cement production.)
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.
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In 1225 Henry III gave every man the right to sink a marl pit on his own land. Spreading chalk on the fields was a common practice in the Middle Ages. This appears to have continued into the 19th century. The need for chalk in agriculture supports the theory that the origin of deneholes was for chalk extraction. [citation needed]
Boxford Chalk Pit is a 0.4-hectare (0.99-acre) geological Site of Special Scientific Interest in Boxford in Berkshire. [1] [2] It is a Geological Conservation Review site. [3] [4] This site has a unique succession of tilted beds dating to the Upper Cretaceous, between the late Coniacian and the Santonian, from around 87 to 84 million years ago.