58 



\i;t. •!.— B. koto 



curves. These peculiar features which characterize the coast, are 

 nothing more than the outcome of the joint-work of the orogenic 

 movements that gave form to the Korean and Han-san ranges. The 

 inlets are the remains of tectonic valleys, while the headlands 

 represent the ridges. Especially remarkable is the narrow canal of 

 the free port, Ma-san-pho which presents the outline of a compound 

 cross with a single axis, due to the Korean and Han-san ridges which 

 intersect each other on both sides of the entrance. (Pages 26-31.) 



This is a special form (PI. Ill, Fig. 2) which truly deserves an 

 independent position in the list of many coast-types. [ name this 

 the Nam-häi type, as this special kind of coast-line is seen all along 

 the shores of the Nam-hai or South Sea of South Korea. 



v. A great number of small ridges or fault-scarps traverse like 

 a gridiron the whole of Paleo-Chvo-syon. The region is somewhat 

 similar in its geological structure to the western half of Shan-tung. 

 Well-established rules can be scarcely discovered in the arrangement 

 of ridges. The whole tract is broken up into a number of long 

 orographic blocks, each being of old sedimentaries, mainly of grey 

 tabular limestone. Each block is tilted along the long side with steep 

 walls, while it slants gradually towards the opposite direction. Some 

 of the equatorial ridges may be brought into connection with the 

 tectonic line of Shan-tung, e.g., Myör-ak-san of Hoang-hai Do, while 

 others of the same group are difficult to correlate with any known 

 system. Meridional ridges, though coinciding in direction with some 

 of the Korean System, do not harmonize wit 1 1 each other in position, 

 nor in magnitude of disturbance; the general plan of the west coast. 

 however, »'(ans to have been greatly influenced by them. (Pages 

 16-50.) 



In short, the intercrossing fault-scarps of Paleo-Chyo-syon 

 inserted between the Sinian and Liau-tung systems seem tobe'thn 



