STRUCTURAL GEOLOGY. 



519 



is distributed among a series of parallel planes at short distances from 

 one another, ^ instead of being concentrated along a single plane, thus 

 giving rise to a distributive fault (Fig. 429). This is perhaps more 

 common in normal than in reversed faulting. 





Fig. 428. Fig. 429. 



Fig. 428.— Branching-fault. (Powell.) 

 Fig. 429. — Diagram showing a series of small faults — distributive faulting. 







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Fig. 430. — Fault in Gering series. Near Rutland Siding, near Crawford, Neb. 

 (Darton, U. S. Geol Surv.) 



The amount of throw occasionally reaches several thousand feet. 



Occasionally faults of incredible dimensions are reported, but these 



are perhaps misinterpretations. Faults are observed to die out gradu- 



1 Becker. Geology of the Comstock Lode, Mono. Ill, U. S. Geol. Surv., Chapter IV. 



