LOWER TRANSITION ROCKS. II7 



The westernmost of the four beds forms the crest of the 3,101 feet 

 Trigonometrical station peak shown in the map, which is the highest 

 point in the Appianhalli section of the south-eastern division. 



South of the Appianhalli valley water-shed the broad trapflow 

 Southern extremity there exposed is deeply eroded, and slopes down 

 of the Sandur synclinal. rapid i v to the saddle by which the unfinished 

 Kudligi-Bellary high-road crosses the southern end of the fusiform 

 Sandur area. The stream draining this trap valley leaves the trap 

 and cuts across the western haematite beds to fall into the Golia 

 Linganhalli stream, a little above a spot determined by the Mysore 

 Topographical surveyors to be exactly 2,000 feet above sea level. 



The various beds have thinned out so much by the time they reach 

 Southerly thinning the g n ^ roa< ^ saddle that thicknesses of hundred 

 out of beds. Q f f eet a £ ew m ji es t the north are here repre- 



sented by tens of feet, and as they rise again to the southward the 

 thinning out seems to continue at an increased rate. Many die out 

 completely, and the lower beds of the series have become more meta- 

 morphic in their appearance and are often not easy of recognition. 



Along the road in the saddle the following succession was noted 

 The "Saddle" sec- in downward succession proceeding from east to 

 tion> west, the eastern wall of the synclinal being 



apparently cut off by a great fault : — 



8. Trapflow. 



7. Schists, hornblendic, black and green, with granite veins. 



6. Haematite quartzite. 



5. Schists. 



4. Haematite quartzite. 



3. Schists, drab and grey. 



2. Haematite quartzite. 



1. Schist, drab and grey. 



The trap westward of the schist No. 7 forms a broad belt which 

 forms the basement of the Dharwars in this quarter. It lies upon the 

 levelled surface of the granite gneiss of the Golla Linganhalli valley, 

 a well-marked inclined plain very similar to that described previously 

 as forming the eastern slope of Uchingi Drug (see pages 32 and 46), 



( 117 ) 



