STRATIGRAPHY OF CHI-LI AND SHAN-SI. 141 
Feet. Meters. 

SS SSS ee ee 
Limestone, thin-bedded below and 




Ki-choéu. PS SS SSeS se thicker bedded above, to top of 
€0k feed cliff about 2,700’ above the Pre- 
- Cambrian. 
188 57 Red shale. 
q 
ke 
a 
iS 
3 Man-t’o, £m 
? 
° 
w 
we) 
g 10 3 Yellow limestone. 
i 4 22 Green shale. 
20 6 Purple shale. 
8 2.4 | Yellow limestone. 
87 26 Sandstone. 
4 te Sandy shale. 
Lz 3.6 Red sandstone. 
: a 2 6 Conglomerate. 
ae —Unconformity— eS a 
54 eee. ne TIAA Chlorite-schist. 
[asf oa NO S25 
2g Si-t’ai. Nk SS 
Fic. 34 (WILLIs).—YEN-T’ou, SHAN-SI. MAN-1’0 FORMATION (CAMBRIAN) LYING UPON SI-T’AI 
(ALGONKIAN) GREEN SCHIST IN CLIFFS ALONG THE O-SHUI, NORTHWEST 
OF WU-T’ AI-SHAN. 
The valley of the Shi-t’ou-ho south of Téu-ts’un affords several sections 
of the Sinian. East of the river the rocks lie in a sharp syncline, over- 
thrust from the north by Algonkian schists and limestones (Fig. 35). 
The overthrust lies near the base of the Sinian, and at times cuts out 
