GEOL 1001 : GEOL FOR EXAM 2 LECTURE 92
Document Summary
Sediments are produced on earth"s surface as a result of weathering. Sediments are transported and become sedimentary rocks after they come to rest. Sedimentary rocks give evidence of ancient sedimentary environments where they formed. Sedimentary rocks are important for economic considerations because they may contain: Rock types are based on the source of the material: detrital rocks- transported sediment as solid particles, chemical rocks- sediment that was once in solution. The chief constiuents of detrital rocks include: clay minerals, quartz, feldspars, micas. Shale: mud-sized particles in thin layers that are called lamina, most common type of sedimentary rock. Sandstone: sand-sized particles, forms in a variety of environments, predominant mineral = quartz. Conglomerate and breccia: both are composed of particles greater than 2 millimeters in diameter, conglomerate consist largely of ------ particles. Burial is the preservation of sediments within a sedimentary basin. Transition of one rock into another by temperatures and/or pressures unlike those in which it formed.
