Hillhead 2012
19 - 21 June 2012
International live demonstration show for the quarrying, recycling and heavy construction industries at Hillhead Quarry, Buxton, UK.
ooliths
Ellipsoidal or spherical accretionary bodies, usually less than 1mm in diameter, composed of concentric layers of calcite, aragonite or iron carbonate.
The monthly journal for the quarry products industry.