16 ART. 2. — B. KOTÔ: 



orthociasc ; '^ both being to some extent kaolinized, but not altered 

 into niuscovite. Though the mineralogical composition of the rock 

 approaches that of aphte, it is not proper to call this a granite, 

 for it has the appearance of feldspar-greisen, tliough in its mode 

 of occurrence and coarseness of structure it resembles granite. 

 Kinne -^ gave the name Uhigtaidte to a granite having the 

 orthoclase-phenocrysts in the granitic matrix. In our rock, quartz 

 has sometimes a tendency to phenocrystic development in lieu 

 of feldspar so that it is called the qucuis-tsingtauite.^^ Probably the 

 Klau-tcJiau and the Korean granite liave the same genesis. 



The main road led us from the Kam-kocjai^^-chyumak to AIu- 

 rang^^ over a spur of Keum-jyöng-san, and tlien across the river- 

 flat to Kiil-pJio on the bank of the Nak-tong-gang. Then we 

 crossed (PI. T., Fig. 2) by ferry-boat the three arms, 6 hn broad, 

 into wliich the river is divided by intervening sandy bars which 

 are partially under cultivation. There are also pools and little 

 paddy fields. The deposition of sand is here specially favored 

 by the surrounding topography and tlie paralyzing influence 

 of tide water upon the current of the river. The Nak-tong river in 

 its upper course runs through the gorge of Kkachhi-uon-koan.^^ 

 Here on a rocky cliff still stands an old gate of the same name, 

 which once served as a watch-tower, where vigilant outlook was -^^ 

 kept for foes approaching by land or sea, and was also made /' 

 use of in collecting duties on the cargoes of junks. The river 

 after leaving the narrows at Mul-geun "^ enters an open flat where 



1) This is a characteristic feature constantly recurring in the Korean granite-porphyries. 



2) Zeitschr. d.W. geol. Gesell. Bd. SC, S. 144, 1904. 



3) Later I call it by the name of mnsnn'de. See page 22. 



4 -H-iDRfS;^ 5) ^n: 6) güi^g^ 7) ^^ 



