158 



AUSTEALASIA. 



tlie west. Nevertlieless, the eruptions that have taken place during the historic 

 period have been less terrific than those of some other Javanese volcanoes. Some 

 of Merapi's trachytic walls have a columnar formation resembling that of the 

 Stafïa basalts. 



East of Merapi the igneous system is completely interrupted by the alluvial 

 valley of the river Solo. In this part of the island the main range consists of 



Fig. G2. — South- West Slopes of Kelut. 

 Scale 1 : 200.000. 





112° 10 



tast or breenwich 



II 2° 20' 



3 Miles 



milk-white limestone rocks known by the name of Gunong Sewu, or the " Thou- 

 sand Mountains," and developing a long line of cliffs on the southern seaboard. 

 The highest peaks rise to about 2,000 feet; but most of the "thousand" 

 eminences scattered over the plateau range from 100 feet to little over 200 

 feet. They are separated by winding valleys shaded by the finest forest 

 trees. Some of the narrow longitudinal dales, mostly overgrown with tall grasses. 



