21. Products exported from the site include roadstone, agricultural lime, industrial carbonate, crushed rock aggregate & pre-cast concrete products. 22. Although there are limestone quarries in the northern part of Texas, they tend to specialize in crushed rock . 23. One ton of crushed rock would yield only half an ounce ( 14 grams ) of gold, he said. 24. The crushed rock contains traces of gold, which will bond with liquid mercury dumped into the vat by villagers. 25. The use of crushed rock salt for melting snow and ice on roads was also introduced during this period. 26. From the end of the rail, the reservation is a crushed rock pathway mainly used by bicycles and pedestrians. 27. A major use for basalt is crushed rock for road and housing construction in concrete, macadam, and paving stones. 28. :: Screenings generally refer to a crushed rock which has passed through a screen with holes of a particular size. 29. The original bedrock in the area was fractured and a powder of crushed rocks was forced into all the fractures. 30. In the summer of 1985, Larry injured his back shoveling crushed rock to create a driveway at his mother's house.
