300 RESEARCH IN CHINA. 
Han system. The system comprises representatives of the Ki-sin-ling, 
Sin-t’an, Wu-shan, and K’ui-chéu divisions, as recognized among the 
terranes of the Yang-tzi valley; and also the similar rocks constituting 
the Hei-shui series of the northern Ts’in-ling-shan. The latter series is 
probably equivalent to the Paleozoic of the Han system, but is geographi- 
cally separated from the area of typical occurrence, the Han valley, and 
is lithologically somewhat dissimilar. 
The following table shows the tentative correlations which we have 
reached, between the series of the metamorphic Han province, and those 
of the non-metamorphic Yang-tzi province. 
TERRANES OF THE HAN PROVINCE. 
Shi-ts'tian sandstone (Jurassic): 
Reddish cross-bedded sandstone with basal con- 
glomerate moderately indurated. Not metamor- 
phosed. 
K’ui-chéu schists (Permo-Mesozoic): 
Silvery mica-schists with local seams of coal; 
include thin layers of marble, magnetite-phyllite, 
and gneiss. On Han river, spotted biotite-sericite- 
schists with garnets are characteristic rocks. 
Wu-shan argillite and limestone (Carbontferous): 
Black impure limestone and slate with local 
seams of anthracite. North of Han river limestone 
largely silicified and shaly portions converted into 
schists. Probably represented in the southern 
exposures of the Hei-shui series. 
Sin-t’an argillites (Middle Paleozoic): 
Green slates, partly hard and siliceous, but partly 
clay-slate. In Han valley and north represented 
by gray-green phyllite and quartz-slate. Probably 
represented by a considerable thickness in the Hei- 
shui series. 
Ki-sin-ling limestone (Cambro-Ordovician): 
Hard gray limestones. North of Chén-p’ing- 
hién seen only on the Han river above Han-wan- 
ch’éng. Probably represented in the northern 
exposures of the Hei-shui series. 
Ts’in-ling schists (Algonkian) : 
Green chlorite-schists with thin beds of siliceous 
limestone and quartzite; locally biotite-schist and 
sericite-schist. 

TERRANES OF THE YANG-TZI PROVINCE. 
Not seen but probably present, possibly equiva- 
wes to the coal-bearing strata of the upper K’ui- 
chéu. 
K’ui-chou red beds (Permo-Mesozoic): 
Massive red shales and sandy strata with beds of 
gray marine limestone. Coal-seams occur locally 
in upper portion of formation. 
Wu-shan limestone (Carboniferous): 
Thick-bedded dark limestone with thin local 
shales and quartzite near the base; lower portion 
rich in round nodules of black flint; local coal 
beds. 
Sin-t’an shale (Middle Paleozoic): 
Massive green shale with local black and brown 
shales and thin green quartzite. 
Ki-sin-ling limestone (Cambro-Ordovician): 
Massive gray limestone with little or no flint. 
Thin-bedded near the base and locally shaly near 
the top; fossils ranging from Lower Cambrian to 
Middle-Ordovician. 
Algonkian rocks: 
Argillaceous, ferruginous limestone, micaceous 
quartzite, etc., seen as erratics in Nan-t’ou till; 
not observed in place. 
Huang-ling granite (Pre-Cambrian): 
Gray quartz-diorite, probably associated with 
various schists, slates, and basic intrusive rocks. 
DESCRIPTION AND INFERENCE. 
In order to pursue our inference from the sound basis of definite 
stratigraphy of the non-metamorphic strata to the vague correlations we 
may suggest for the metamorphic rocks of the Ts’in-ling-shan, we retrace 
the steps of our journey, proceeding in this description from south to north. 
We go from Chén-p’ing-hién to Hing-an-fu on the Han, up the Han to 
Shi-ts’tian-hién, and thence northward across the Ts’in-ling-shan. 
