Figure 21--Photomicrographs of detrital constituents. 

(A). FCD Mary No. 1A-9 (9-24N-6W): 6425 ft--Quartz, the most common detrital constituent, is composed mainly of single crystals, some with overgrowths; crossed nicols. 

(B). TXO Sullivan No. H-4 (34-26N-7W): 6055.5 ft--The cloudy core of this dolomite in quartzose sandstone may have been detrital in origin; the clear outer portion stained by potassium ferricyanide indicates a later phase of ferroan dolomite; plane-polarized light. 

(C). Amcana Anderson No. 1-2 (2-14N-3W): 6081.5 ft--Detrital clay matrix in quartzose sandstone is composed mainly of illite; it dominates over authigenic matrix in the Misener; crossed nicols. 

(D). Mobil LeForce No. B-2 (23-26N-7W): 6008.4 ft--Illitic detrital matrix with microporosity shows neomorphism; possibly some original illitic matrix still has not experienced recrystallization; crossed nicols. 

(E). Mobil LeForce No. B-2 (23-26N-7W): 5987.4 ft--Microcline in a quartzose sandstone shows signs of dissolution; crossed nicols.