JOURNEYS THROUGH KOREA. 29 



of Pal-chhi^^ (100 ?7i liigli) (^f the same grayish, banded compact 

 rock. From the watershed tlic topography opens out and slopes 

 to the west of north-west. The ridge Nok-nön-san "\ lying to the 

 right, comes from Tan-^ong''^ in a south-easterly direction, and 

 proceeds due east through the I'onfj-chydn pass already mentioned, 

 between Ma-san-pJio and Chin-häi, terminating at the mouth of 

 the Nak-tong-gang, as may be traced on the map appended to 

 my former paper ""l To the left, on the other hand, a ridge running 

 parallel to that already mentioned becomes low and less-defmed. 

 We descended then through the unfruitful gravelly bottom of the 

 valley to the apparently prosperous chyumak Pan-song ^\ 



From knowledge gained during other traverses in Kybny-sang-Do, 

 I expected to meet with the underlying complex of red marl "^ and 

 grey sandstone, and my expectation was duly fulfilled in finding the 

 beds near Pan-song, dipping with varying angles to the east, creep- 



t (Piige 28) I took home a jjebble with a label remark statiug that the rock seemed to have 

 some connection with the green iioryphyrite of the region. On close examination it proved to 

 be andenrliorite. It has a young aspect, though the appearance is dull ; the texture is medium- 

 granular and the colour light-gray. The components are, in order ot (Quantity, plagioclase, 

 orthoclase, quartz, hornblende, biolite, augite and titanite. 



The plagioclase (1.4 mm in length) is of a microtine habit, fresh but full of fissures. It 

 has liquid as "well as air inclosures arranged in central zone.". Twinned in the albite, carlsbad, 

 and pericline laws, the suture-lines are clear and sharp, but the width A'aries from 

 one lamella to another. By Becke's method w <y' and e > o' ; maximum equal extinction 12^ 

 14.° From the above it may be" inferred that the plagioclase is the one near andesine. The 

 form is aiitomorphic and zone- structured with largest extinction-angles on the periphery. The 

 habit is dioritic and andesitic. The orthoclase enclosing the plagioclase builds up an interloclcing, 

 but not the pegmatitic, aggregation with quartz, and is extensively kaolinized. The common 

 grayish-green hornblende resolves at terminal faces into fibres, and sometimes forms perimorphic 

 shells around a light-green augite, the latter mineral is seen only in this form. The brown 

 biotite is bleached green. Accesories are titanite in crystals and grains, magnetite in clumps and 

 crystals. In mineralogical components and texture our rock is allied to Stelzner's andendioriie. 



1) B ^^ i^m 2) m Cl ui 3) j^ i,ii 



4) ' Orographic Sketch of Korea.' This ridge separated us from the mmnu'is of Ham-an 

 and Eui-ryöng. 



5) The twin village, where we staye-d is Il-Pan-söng (^ — ^ ^). 



6) It effervesces with acid. 



