Whinstone is a term used in the quarrying industry to describe any hard dark-coloured rock. Examples include the igneous rocks, basalt and dolerite, as well as the sedimentary rock, chert. See more The Northern English/Scots term whin is first attested in the fourteenth century, and the compound whinstone from the sixteenth. The Oxford English Dictionary concludes that the etymology of whin is obscure, though it … See more Massive outcrops of whinstone occur at the Pentland Hills, Scotland and the Whin Sills, England. It is used for road … See more WebConstruction materials [ edit. They are often made of wood, such as old railway sleepers, telegraph poles or even tree trunks. For a longer 'life' more resilient iron girders or pipes may be used and concrete posts are …

Stone defects - beta.underoneroof.scot

WebJul 22, 2024 · Basalt and whinstone are other metamorphic rocks with similar characteristics to granite. Limestones – the most famous of which being the Portland stone deposits of Dorset, but also produced in … crystal monroe author

Granite Types – Canada Curling Stone

WebMar 27, 2014 · The rock, known locally as whinstone, is a type of dolerite. It was formed by the intrusion of a hot liquid magma pushing between existing layers of rock. The magma … Webproperty of stone: granite or whinstone, the wall thickness figure impacts the U-value. The wall U-value is the rate at which heat is lost through windows, walls, floors and roof of a dwelling, hence an important factor in the software’s calculations of the SAP rating. Variations on the wall thickness impacting the U-value only WebSandstone is almost pure silica at between 70-90%, granite is around 15-30% silica. The image below shows the maximum amount of silica dust someone should be breathing in a day after using the right controls, compared to the size of a UK penny.. The danger to stoneworkers comes from activities such as cutting, drilling, grinding, carving and ... crystal monroe books