Smithsonian Report, 1 91 5.— Walcott. 



Plate 7. 



View Showing Massive Character of Cambro-Ordovician Limestone, in Broad 

 Syncline East of Yau-t-ou Coal Field, Province of Shan-si, China. 



Illustrates abrupt walls of recent canyons cut in heavy limestone. ^^^ /he T'ayshan-ho 4^iles 

 southwest of Bhi-pan-k'on, in the district of Wu-fai-hien Province of Shan-si. (After Winis, 

 Research in China, Pub. No. 54, Carnegie Institution of Washington, 1907.) 



