606 



Also to the south of the G. Karang, does the Tji Leiingsi, which 

 flows here through a narrow cleft, present an almost continuous 

 disclosure of Tertiary. Again we observe every wliere the bluish-grey, 

 occasionally marly shales, containing locally many calcite dykes and 

 septarian nodules, composing the whole formation ; volcanic material 

 is absolutely wanting down to the core of the anticline, so beauti- 

 fully disclosed here, the eastern elongation of the Pr. Maceng anti- 

 cline. It is true though, that discordant, thick river-sediments of 

 volcanic material are here seen to overlie the denuded shales. This 

 material comprises some huge blocks, most likely remains of a young 

 tuff-breccia, which foruieily overlay tiie whole area of shales. In the 

 profile of the Tji Leungsi the core of the anticline descrit)ed, is 

 arched nearly horizontally ; farther on the South arm. however, 

 many disturbances are to be seen, while still farthei', quite near 

 the shales — some kilometers west of the Tji Leungsi — the solid 

 andesite rock can be detected. Generally the shales dip in the direction 

 of the andesite. 



A last series of researches was made east of the Tji Leungsi — 

 in the basins of the Tji Djanggal and Tji Pamingkis. Iji the Tji 

 Paraingkis we find below the embouchure of the Tji Handjawar 

 only the typical clay-formations of a peculiar position ; the strata 

 are sloping mainly to the east. Here the vast anticline, which we 

 saw emerging from the West, east of Buitenzorg, may be supposed 

 to dip again towards the east. 



In the upper course of the Tji Djanggel shale was found sloping 

 towards the south at only about 10 m. from the steep blocks of 

 hornblendic andesite and its breccia. This again bears witness to the 

 fact that the shale dips in the direction of the andesite, but it is 

 still a matter of conjecture whether the andesite overlies the shale 

 or whether it is separated from it by shifting. Perfectly analogous 

 phenomena were noted between the Tji Danggel and the Tji Handjawar 

 in a small river, the Tji Soerian. Here we see moreover distinctly 

 in some places that the hornblendic andesite breccia rest on shale. 

 It may also be, though, that such brecciated masses have glided 

 down from the neighbouring mountains and are now, as a secondary 

 formation, superposed on the clay-formation, so that also this obser- 

 vation does not afford conclusive evidence for the relatively recent 

 date of the "Old andesites", although it lends plausibility to the view. 



Finally a very interesting observation was made in the Tji 

 Handjawar, west of the steep, coneshaped Goenoeng Handjawong, 

 970 111. in height. On its left bank, at the base, we find consolidated 

 andesite rock, superposed on this a fine-grained, greyish-green breccia 



