Search results
Results from the WOW.Com Content Network
This natural stone has a distinct gray/blue/black color and glistens due to its mica content. One of the highest quality slates in the world, this unfading slate has long been used for architectural applications such as flooring, paving, wall cladding, stairs, counter tops, fireplace surrounds, gravestones and roofing.
Chile Bar Slate company quarry, off of highway CA193 next to the American River near Placerville, California; Limestone quarry near Auburn, California of the Mountain Quarries Company of San Francisco, a subsidiary of Pacific Portland Cement Company, near confluence of the North Fork and the Middle Fork of the American River.
A search is under way to trace the stories of more than 30 fragments of the Stone of Destiny which separated from the ancient artefact after its famous theft from Westminster Abbey and secret repair.
This natural stone has a distinct gray/blue/black color and glistens due to its mica content. One of the highest quality slates in the world, this unfading slate has long been used for architectural applications such as flooring, paving, wall cladding, stairs, counter tops, fireplace surrounds, gravestones and roofing.
The world's biggest consumer of slate is France, followed by the UK, USA and Germany. In 2012, Spain produced more than 580,000 tonnes (570,000 long tons; 640,000 short tons) of slate worth about $380 million. This made it the largest slate producer in the world, followed by China and Brazil. [3]
The quarrying of slate in Cornwall is known to have been carried out from the late mediaeval period and there was a considerable export trade from some of the quarries near the coasts in the 19th century. Slate has also been quarried at Swithland in Leicestershire. There are considerable workings in Cumbria. During the last 500 years, much ...
The Massachusetts Hornfels-Braintree Slate Quarry is a prehistoric archaeological site [2] in Milton and Quincy, Massachusetts. It consists of a series of pits and trenches used from 5,000 B.C. until the early 17th century as a source of slate and hornfels used for chipped and ground tools.
Other elements of Sanborn's installation include a landscaped garden area, a fish pond with opposing wooden benches, a reflecting pool, and other pieces of stone, including a triangle-shaped black stone slab. [1] The name Kryptos comes from the ancient Greek word for "hidden", and the theme of the sculpture is "intelligence gathering". The cost ...