Geology. — "Fractures and Faults near the Surface of Moving 

 Geanticlines. II. Abnormal Strikes near the Bending-points of 

 the horizontal projection of the Geanticlinal . axis." By Prof. 

 H. A. Brouwer. 



(Communicated at the meeting of September 30, 1922). 



Ill a previous paper ^) we liave pointed to the occurrence of 

 considorable transvei'se fractures near the bending points of the hori- 

 zontal projection of the geanticlinal axis, which phenomenon has been 

 explained by velocity differences on either side of these bending 

 points. 



Another phenomenon that may be observed near the bending 

 points is the occurrence of older strikes, inclined or normal to the 

 horizontal projection of the axis '^). Tiiis may be seen in rows of 

 islands if the strikes in some islands do not coincide with the main 

 trend of the islands. It is of great interest for determining the 

 precise movements of the rows of islands, as will be shown in the 

 following discussion. 



The roio of Islands Sermata- Islands, Babber, Tenimber- Islands. 



In the islands Letti, Moa, Luang and Sermata the principal strikes 

 are sometimes more or less parallel to the direction of the row, 

 e.g. in Letti. » 



Fig. 1. 

 Horizontal projection of the geanticlinal axis (schematic-representation). 

 Older strikes and coastlines. 



In Moa some strikes are N.N.E. to N.E., so these are different 

 from the direction of the row ; in Luang the permian strata are 



1) These Proceedings XXIII, p. 570, 



-) H. A. Brouwer, The horizontal movement of geanticlines and the fractures 

 near their surface. Journ. of Geology. XXIX, 1921, p. 560-577. 



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