Ballagan Sandstone

Ballagan Sandstone was sourced from several parts of central and southern Scotland, including Ayrshire, Berwickshire, Dumfriesshire, Edinburgh and Roxburghshire. The stone consisted originally of sand that was deposited in river deltas and estuaries in a subtropical or tropical environment during the early part of the Carboniferous Period (c. 350 million years ago), when Scotland was just north of the Equator. Ballagan Sandstone was used locally and regionally, mainly to form masonry. Today, Ballagan Sandstone is extracted for building stone at one quarry.

Building Stone ID 10,037

Geological description

Rock category  
Sedimentary rock
Stone type  
Sandstone
Source bedrock unit  
Ballagan Formation
Colour  
Grey to buff and pink to brown
Grain sorting  
Moderately well-sorted
Grain-size  
Medium sand (0.25 to 0.5 mm) and fine sand (0.125 to 0.25 mm)
Cohesion  
Moderately cohesive to strongly cohesive
Water absorption  
Very high and high
Fabric  
Uniform (some orientated grains)
Distinctive features  
None

Historic significance

Maximum historical geographic reach  
Local (score = 1)
Extent of historic building stone quarrying  
Extensive (score = 3)
Historic significance score  
Highly significant (score = 6)

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