Trap Rock Dark igneous rocks used to make crushed stoneAreas characteristic of this landscape include parts of New York and New Jersey where the About 60% of the crushed stone used in New Jersey is trap rock from the -characteristic of crushed stones-,characteristic of crushed stones vibrating sieve separatorcharacteristic of crushed stones Environmental Characteristics of Clays and Clay Environmental Characteristics of Clays and Clay Mineral Deposits …… Get More