SPORT AND SCIENCE ON THE 
of a brown or brick-red colour, and other volcanic 
rock in great confusion. Specimens of serpentine 
and metamorphosed felspathic rocks were also 
obtained. To the north-west, basalt is exposed 
in the deep cutting of the stream bed, which ends 
in the Han-nor-pa pass. Further up this valley 
extensive beds of volcanic ash occur, which at 
first sight might be mistaken for the sedimentary 
rocks of the Shansi formations. The deposits 
are of a bright red colour, and in places assume 
the form of conglomerates, with large well- 
rounded boulders. This suggests that these beds 
were laid under water. Nearer the pass, these 
deposits are much lighter in colour, being pink 
or buff and light blue-grey. In places the original 
substance has degenerated into soft clay, while, 
wherever the strata assume the form of con- 
glomerate, the fragments of harder rock are rough- 
edged and not rounded as they are nearer Kalgan. 
Beyond these beds basalt occurs right up to and 
beyond the Han-nor-pa pass. 
PART 5 
Tur GEOLOGY OF THE CH’ING Ho anp HsI-wan- 
TtzU District, NORTHERN CHIHLI 
Leaving Kalgan we travelled northward up the 
valley of the P’an-chang Ho for about six miles. 
The sides of this valley are steep and composed 
entirely of outcrops of trachyte of a mauve grey 
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