Argillite - finished
Dark bluish-gray argillite (Metamudstone Member of the Cid Formation) is quarried by Jacobs Creek Stone Company from slate belt rocks in Montgomery and Davidson counties, North Carolina (NC).
The stone's smooth natural cleavage allows it to be used extensively in flooring, stair treads, borders and window sills. Many public school window sills in North Carolina are made from this stone.
The following pages illustrate the process of mining, finishing the argillite, and product examples.
The process begins when the argillite is mined by a front end loader from fairly small open cuts (below). The process begins by loading large slabs of argillite into a small dump truck for transport to the splitting area. The argillite dips to the left in the photograph (toward the northwest).
Mining the argillite and loading it on a small dump truck for transport to the splitting area.