Criggion quarry, Criggion (2)
Introduction
The photograph on this page of Criggion quarry, Criggion (2) by Stephen Richards as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk
Criggion quarry, Criggion (2)
Image: © Stephen Richards Taken: Unknown
Some of the quarry machinery, behind which is a small part of the exposed north-west face of Breidden Hill, primarily an Ordovician porphyritic dolerite, comprising plagioclase feldspar, epidote, olivine, clinopyroxene, chlorite, leucoxene, iron ore, quartz, clinozoisite and allanite. Fuller view here: Image The fruits of this quarry, up to 750,000 tons per year, are mosty used for road-stone and ready-mixed concrete. The hill has been quarried since the early C19th. Until 1967 the face was worked by men descending from the top on ropes, to plant explosives to bring down the rock. Nowadays, rock is crushed in one of the largest items of mobile plant in the country, before being brought to the lower level by conveyor belts and gravity to be crushed further to the required size. Information from various internet sources.
Images are licensed for reuse under creativecommons.org/licenses/by-sa/2.0
Image Location
Latitude
52.723998
Longitude
-3.053726