1. The decomposed peridotite or kimberlite that carries the diamonds in the South African mines. 2. Strata of the coal measures, consisting principally of beds of hard clay or shale.
Related terms:
1. The decomposed peridotite or kimberlite that carries the diamonds in the South African mines. 2. Strata of the coal measures, consisting principally of beds of hard clay or shale.
Related terms: