Ch. 33] 



CHARACTER AND FORMATION 



625 



Fig. 1. Plastic model of intercrystalline porosity, seemingly developed along a 



fracture. Devonian dolomite, South Fullerton Field, Andrews County, Texas. 



Magnification 10X- (From Imbt and Ellison, 1946, p. 367.) 



Fig. 2. Plastic model of intercrystalline porosity, apparently due to weathering. 



Arbuckle limestone (Cambro-Ordovician), Silica Pool, Barton County, Kansas. 



Magnification 11.6X- (From Imbt and Ellison, 1946, p. 369.) 



