Ch. 33] 



CHARACTER AND FORMATION 



627 



Fig. 5. Plastic model of fractured carbonate rock, showing little solution by 

 ground water. Clear Fork formation (Permian), Fullerton Field, Andrews 

 County, Texas. Magnification 10X- (From Imbt and Ellison, 1946, p. 368.) 



Fig. 6. Plastic model of fractured carbonate rock, showing evidence of solution 

 along a fracture. Clear Fork formation (Permian), North Monahans Field, 

 Winkler County, Texas. Magnification 11.6X- (From Imbt and Ellison, 1946. 



p. 369.) 



