Tresayes Quarry | |
---|---|
Location | near Roche |
Nearest city | Truro |
OS grid | SW 995585 |
Coordinates | 50°23′32″N4°49′20″W / 50.39211°N 4.82215°W |
Area | 1 hectare (2.5 acres) |
Operated by | Cornwall Wildlife Trust |
Website | www |
Tresayes Quarry is a nature reserve near Roche in Cornwall. It is also a geological nature reserve of Cornwall Wildlife Trust and is designated as a (non-statutory) County Geology Site. [1] The entrance to the reserve has a small car-park with a gate at ///leader.tango.speakers
Pegmatites can be found here. They are formed by the action of molten magma rising from deep within the Earth's crust. Associated with the pegmatites, rare elements, such as niobium, cerium and beryllium also occur. [2]
When the quarry was first opened in the late 19th Century, it was a source of pure feldspar which was used in the glass making industry. The site was known locally as the Glass Mine or Polpuff. [3] It closed for several years but reopened in 1917, during the First World War, to provide feldspar for electrical porcelain with at least 50 bal maidens separating the feldspar. [4]
Since 2011 the quarry has been an EarthCache, visited by the geocaching community. [5]
Amazonite, also known as amazonstone, is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. Its chemical formula is KAlSi3O8, which is polymorphic to orthoclase.
Ytterby is a village on the Swedish island of Resarö, in Vaxholm Municipality in the Stockholm archipelago. Today the residential area is dominated by suburban homes.
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known.
Derbyshire Wildlife Trust is one of 46 local Wildlife Trusts around the UK working to promote and protect local wildlife. It covers the whole of Derbyshire and was founded in 1962 in response to environmental threats to the local countryside, since when it has continued to grow. The trust is now based at East Mill on the River Derwent in the town of Belper, Derbyshire. It is a registered charity, supported by more than 14,000 members and over 500 volunteers.
The Leicestershire and Rutland Wildlife Trust (LRWT) is one of 46 wildlife trusts across the United Kingdom. It manages nature reserves in Leicestershire and Rutland, and was founded in 1956 as the Leicestershire and Rutland Trust for Nature Conservation. As of January 2018, it has over 16,000 members, a staff of about 25 and more than 500 volunteers. It is based in Leicester, and is managed by a Council of Trustees which is elected by the members. It is a charity which covers all aspects of nature conservation, and works to protect wild places and wildlife.
The Avon Wildlife Trust aims to protect and promote wildlife in the area of the former county of Avon — now Bath and North East Somerset, Bristol, North Somerset and South Gloucestershire, in England. It has its headquarters in Bristol and runs wildlife centres at Folly Farm, Somerset and Grow Wilder, Frenchay, North Bristol.
Goonhilly Downs is a Site of Special Scientific Interest (SSSI) that forms a raised plateau in the central western area of the Lizard peninsula in southern Cornwall, England. It is one of 229 English national nature reserves designated by Natural England with an area of almost 1,270 hectares.
Mining in Cornwall and Devon, in the southwest of Britain, is thought to have begun in the early-middle Bronze Age with the exploitation of cassiterite. Tin, and later copper, were the most commonly extracted metals. Some tin mining continued long after the mining of other metals had become unprofitable, but ended in the late 20th century. In 2021, it was announced that a new mine was extracting battery-grade lithium carbonate, more than 20 years after the closure of the last South Crofty tin mine in Cornwall in 1998.
Roche is a civil parish and village in mid-Cornwall, England, United Kingdom. The village gets its name from the 20-metre (66-foot) high Roche Rock, a quartz-schorl outcrop east of the village. Roche is the Norman-French word for Rock. The parish population at the 2011 census including Belowda, Bilberry, Carbis, Coldvreath and Criggan is 3,381, and the ward population at the same census was 3,867.
Browne's Folly, or Brown's Folly, is a folly tower sitting within a 39.9 hectare biological and geological Site of Special Scientific Interest (SSSI) near the English village of Bathford in Somerset, notified in 1974: the site itself is known as the Farleigh Down Stone Quarry and is managed as a nature reserve by the Avon Wildlife Trust (AWT). The tower was built in 1848 and is a Grade II listed building.
A bal maiden, from the Cornish language bal, a mine, and the English "maiden", a young or unmarried woman, was a female manual labourer working in the mining industries of Cornwall and western Devon, at the south-western extremity of Great Britain. The term has been in use since at least the early 18th century. At least 55,000 women and girls worked as bal maidens, and the actual number is likely to have been much higher.
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Meeth is a small village roughly 13.5 km (8.4 mi) north-northwest of Okehampton and 40.7 km (25.3 mi) west-northwest of Exeter. It lies to the west of the River Torridge. In the past, ball clay mines were a major source of employment in the village, lying just to the west, however these closed in 2004. Their site is now a nature reserve owned by the Devon Wildlife Trust, called Meeth Quarry. The Trust's Ash Moor reserve is also located close to the village.
Helman Tor is a granite hill in mid Cornwall, UK with several separated tors, and is designated as a (non-statutory) County Geology Site. The hill also has a Scheduled Ancient Monument. Helman Tor is also the name of the largest nature reserve managed by the Cornwall Wildlife Trust which includes Breney Common and Red Moor. The Wildlife Trust aims to rewild the reserve, including potentially releasing beavers, as well as long-horn cattle and Cornish black pigs. Helman Tor, along with Breney Common, Red Moor and Belowda Beacon, is part of the Mid Cornwall Moors Site of Special Scientific Interest. It lies on the Saints' Way, a long-distance footpath completed in 1986.
College Lake is a 65 hectare nature reserve in a former chalk quarry in Pitstone in the Aylesbury Vale district of Buckinghamshire. It is one of the flagship reserves of the Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust, and it has an information centre, education facilities, a café, toilets and a shop. It is in the Chilterns Area of Outstanding Natural Beauty. The area east of the lake is a geological Site of Special Scientific Interest called Pitstone Quarry.
Bumpus quarry is a quarry in Oxford County, Maine, in the United States. It is primarily known for being the source of some of the largest beryl crystals ever found, up to 27 feet in length, weighing 26 tonnes.