Pettijohn "1972" (Ichron)
Quartz, Chert
Rock Fragments (and other mineral grains)				
Feldspar
Quartz Arenite	 "100~0~0"	 "95~5~0"	 "90~5~5"	 "95~0~5"
Subfeldspathic Arenite	 "95~0~5"	 "90~5~5"	 "50~25~25"	 "75~0~25"
Sublithic arenite	 "90~5~5"	 "95~5~0"	 "75~25~0"	 "50~25~25"
Feldspathic Arenite	 "75~0~25"	 "50~25~25"	 "0~50~50"	 "0~0~100"
Lithic Arenite	 "50~25~25"	 "75~25~0"	 "0~100~0"	 "0~50~50"
