Multiple Choice
A graywacke is_______ .
A) a sandstone with the sand grains embedded in a clay- rich matrix
B) a dark, organic- rich, chemical sedimentary rock containing small crystals of halite
C) a dark- gray, calcite- rich mudstone or shale containing pyrite
D) a limestone with abundant, sand- sized, quartz grains
Correct Answer:
Verified
Correct Answer:
Verified
Q29: Detrital grains of which mineral(s)are extremely rare
Q30: _cement produces bright- red and yellow colors
Q31: _, a common mineral found in igneous
Q33: Which property of sediment describes the range
Q35: _is the most common type of chemical
Q36: Which of the following sedimentary rocks would
Q37: Nonclastic textures are common in which of
Q38: Red, brown and yellow sandstones are cemented
Q39: _are further concentrated in a residual brine
Q71: Coal beds originate in_ .<br>A) shallow lakes