Igneous rock
Building with Scottish Stone, published by the Natural Stone Institute and the Scottish Executive in 2005, defines igneous rocks as: ‘Fine to coarse-grained crystalline rocks originating from the molten state. Basic or intermediate igneous rocks such as basalt, dolerite or gabbro are generally dark or grey in colour and contain little or no quartz. Pale or strongly coloured varieties such as felsite and porphyry are generally associated with volcanic areas. The colloquial term 'whinstone' is commonly used to describe igneous rocks other than granite, although this name is commonly applied to any dark hard rock, such as the sedimentary greywacke sandstone of southern Scotland.’
[edit] Related articles on Designing Buildings Wiki
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Building Safety Newsletter from MHCLG.
An extraordinary record of steel engineering worldwide.
Households living near new pylons to save on bills.
ECA warns growth must not outpace grid capacity or skills.
The role of the client and decision making
CIOB response to built environment professions call for evidence.
Construction's sustainability reporting revolution
Tracking upfront embodied carbon with digital tools.
ECA welcomes procurement reforms
Public spending must back British jobs and skills.
Campaigning for Edinburgh: the Cockburn Association 1875-2049
The role of the civic voice in protecting character. Book review.
CIOB photography competition is open for entries.
ECA Edmundson apprentice of the year award
Finalists announced.
Major new study exposes serious knowledge gaps.
Generating energy from internal light as well as sunshine.