250 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1948 
lO I I2 ISTE 
Okla. (After Hendricks.) 
NW SE 
Ordovicion 
Cambrian 
et 
Ficure 7.—Section across western end of Ouachita Mountains overthrust fault belt extending 
from Lehigh Basin to Round Prairie syncline. (After Hendricks.) 
