GEOLOGIC EXHIBITS IN NATIOIS^AL ZOOLOGICAL PARK — BASSLER 279 



Springs. 

 Strata. 



Stratification. 

 Stream erosion. 

 Stream valley. 

 Strike. 

 Structure section. 



Subsoil. 



Sun cracks. 



Syncline. 



Talus slope. 



Temperature changes. 



Terraces. 



Throw. 



Thrust fault. 

 Transported soil. 

 Unconformity. 

 Vein quartz. 

 Veins. 



Weathering. 

 Wind action. 



