Detrital sedimentary rocks are classified primarilyc B) type of bedding C) composition A) color on the basis of 54. Sedimentary rocks comprise approximately D) particle size A) 5 B) 15 C) 30 D) 50 percent of Earth's outermost 10 miles. 55. Which rock type is associated with a high-energy environment (such as a very turbulent stream)? A) conglomerate B) shale C) chert 56. Compaction would probably be most significant as a lithification process for D) none of these A) shale B) sandstone C) conglomerate D) breccia 57. The most abundant chemical sedimentary rock is A) limestone B) dolomite C) chert D) rock salt 58. Metamorphism may result from B) pressure C) chemical action A) heat D) all of these is a planar, parallel alignment of different mineral bands in a metamorphic rock. 59. C) Stress streaking B) Foliation D) Marbleizing A) Rock cleavage 60. The primary agent of contact metamorphism is B) heat D) strain C) stress A) folding 61. The geothermal gradient represents: A) The earth's temperature decrease with depth B The earth's temperature increases rapidly at depth greater than 1000 km and decreases slowly at the surface. The earth's temperature increases rapidly from the surface and slowly increases after 1000 km of depth depunniform temperature increase form the surface (lithosphere) to the mantle (earth's interior) 62. Differential pressure describes: A) Pressure is equal in all directions when applied to rock material R Pressure is uniform and rock material is squeezed at various depths O Pressure exerted on a beach ball sitting at the bottom of a pool D Pressure is variable and iIs applied in different strengths to rock material.