BULL. GEOL. SOC. AM. 



VOL. 21, 1909, PL. 54 





1 





ANTICLINE IN CHAGRIN SHALE 



This view shows 3 feet of glacial sand and 5 feet of folded 

 iron-stained shale having 3 well defined concretionary iron- 

 stone hands, 3 feet of blue shale with less folding, and 3 feet 

 of horizontal shale. Photograph by Frank R. Van Horn. 



