X1014272764-00057-12597</DOCNO> CHAPTER 6 CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS - Sedimentary rocks are accumulations of minerals and rock fragments derived from disintegration and decomposition of exisitng rocks - comprise ~ 75% of all rocks exposed on the earth's surface 1 CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS 1) Sediment Production 2) Sediment Erosion and Transport 3) Sediment Deposition 2 CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS Sediment Production Mechanical weathering produces rock fragments (boulder, cobble, pebble, granule, mineral grains (sand)) Chemical weathering produces mineral grains (sand), mud (clay minerals), compounds &amp; ions in solution (Na+, Ca2+ etc.) 3 CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS Sediment Erosion and Transport - Erosion physical removal and incorporation of loose rock material, compounds or ions by agents of erosion (wind, water, glaciers and mass movement) - Transport by wind, water, glaciers and mass movement moves the sediments to a different location
(minerals and rock fragments; derived; from disintegration and decomposition of exisitng rocks) (water, glaciers and mass movement) - Transport by wind, water, glaciers and mass movement; moves; the sediments; to a different location; T:wind) (CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS Sediment Production Mechanical weathering; produces; rock fragments) (Chemical weathering; produces; mineral grains)
minerals and rock fragments water, glaciers and mass movement) - Transport by wind, water, glaciers and mass movement CHAPTER 6 SEDIMENTARY ROCKS ORIGIN OF SEDIMENTARY ROCKS Sediment Production Mechanical weathering Chemical weathering
derived moves produces produces
from disintegration and decomposition of exisitng rocks
the sediments to a different location T:wind
rock fragments
mineral grains