31. At San Francisco's Panama Pacific Exhibition in 1915, Granite Rock Company won the Gold Ribbon for excellence in crushed rock . 32. For example, sand, gravel, river rock and crushed rock , and other aggregates are often separated by size using vibrating screens. 33. These crushed rocks or myelonites witness to an ancient metamorphism which occurred well before the shale deposits of Le Vill? 34. The path is crushed rock and dirt; although road bikes can be used, knobby-tired mountain bikes are a better fit. 35. Then he mixed portions of paste with different natural dyes made from crushed rocks and colored mud to create different colors. 36. On this day, though, Berger stood astride a small pile of crushed rock and gazed out at the throngs of refugees. 37. About $ 6million is used to maintain 116miles of freeway landscaping, an estimated $ 103million worth of vegetation and crushed rock . 38. The tramway was used to transport crushed rock from the quarry, it was constructed by the Dandenong Shire Council in 1912. 39. The measured pressure is then divided by the pressure required to achieve an equal penetration on a standard crushed rock material. 40. The proposal, awaiting final approval from state officials, would use a cyanide solution to separate gold from tons of crushed rock .
