Figure 24—Photomicrographs of pore-space morphologies. 

(A). Amcana Anderson No. 1-2 (2-14N-3W): 6081.5 ft--Oversized pore space (OPS) formed as a result of the dissolution of detrital quartz (Q) and siliceous matrix, (SM) to a lesser extent; plane-polarized light. 

(B). Federal Wolleson No. 1 (22-21N-2W): 5097.5 ft--Intercrystalline secondary porosity (blue) in sandy-dolomite facies; plane-polarized light. 

(C). Sun Mt. Killcrease No. 1 (36-5N-7E): 3881 ft--Primary porosity (arrow) and enlarged intergranular porosity and oversized pore space (EP) in a quartzose sandstone containing abundant glauconite (G), phosphate (P), and scattered chert (C) and dolomite (D); plane-polarized light. 

(D). Monsanto Shrewsbury No. 1 (36-27N-8W)): 5862 ft--Silica replacement of anhydrite nodule and resultant secondary porosity (arrow) due to dissolution of relict lath-like anhydrite crystals; plane-polarized light.