GEOLOGY OF CENTRAL SHEN-SI. 307 
A mile above Han-yang-p’ing the supposed Ki-sin-ling limestone is 
succeeded by gray-green siliceous slates, of the character of the meta- 
morphosed Sin-t’an formation. The dip is 20° north and the sequence 
apparently regular. 
In the tortuous course above Han-yang-p’ing the river three times 
crosses a contact between green slates and overlying blue-black limestone, 
a contact such as that which characterizes the base of the Wu-shan for- 
mation. At or near it we noted, in two sections, a conglomerate, which 
we regard as probably a basal conglomerate corresponding with that seen 
south of Pa-kua-miau (atlas sheet c 5). Upstream toward Yii-fang-p’ing 
there occur the calcareous black and coaly argillites of the Wu-shan, which 
are, however, much contorted, the dip varying from 25° to 80° and the 
strike from nearly east-west to northeast-southwest, through an angle of 
135°. The contorted beds are also dislocated and overthrust. 
Two miles, 3 kilometers, below Lién-hua-shi silky gray phyllites suc- 
ceed the limestone in the normal position and with the lithologic appearance 
of the K’ui-chéu schists. Thus the sequence of the Han system, from the 
Ki-sin-ling limestone to the K’ui-chéu schists, appears to be accounted 
for from Han-wang-ch’6ng to this point. 
Below Lién-hua-shi (Lily-flower-rock) the schists are intruded by a 
mass of light-gray granite about 2 miles, 3 kilometers, wide, across which 
the Han has cut a very narrow and beautiful gorge; north of the granite 
the schists extend for 2 miles, 3 kilometers, to a contact with the dark 
quartzitic limestones that in this district appear to represent part of the 
Wu-shan. The strata are associated with coaly beds and characteristic 
blue-black argillites, which form the south bank opposite Shi-ts’tian-hién. 
In the vicinity of Shi-ts’tian-hién the valley of the Han is wide, with 
a long slope on the north and hills of moderate altitude on the south. 
The northern bank and part of the southern, 1.5 to 4 miles, 2 to 6.5 kilo- 
meters, below the city, consist of Shi-ts’iian sandstone which we describe 
as Jurassic (?). We have next to consider the northwestern extension 
of the structure seen near Lién-hua-shi. The occurrence of the K’ui-chéu 
schists near Lién-hua-shi, between the Wu-shan formation on the north 
and south, is probably a syncline, though the Wu-shan on the north 
may be more or less overthrust. In the canyon of the Han west of Shi- 
ts’tian-hién, this belt is crossed again. The dip is from 50° to 70° toward 
the northeast throughout, but we do not doubt that the strata are over- 
turned from the northeast and that the structure is a complicated closed 
syncline. A section extending 7 miles, 11 kilometers, from Shi-ts’tian-hién 
up the river was paced off during our stay at the city, and the following 
sequence was noted. ‘Thicknesses are given to suggest the relative extent 
