IS49.] Statistics of the Circar of Do^vlutabad, 485 



Magnesia, — Olivine. 



. Potash. — Felspar, 

 Clilorite. 



Soda. — Mesotype. 



Acidiferous Alkaline Mineral. — Ni- 

 trate of Potash. 



Acidiferous Earthy Mineral. — Car- 

 bonate of Lime, 

 Calcareous Spar, 

 Opaque Green Calcareous 



Spar, 

 Calc Tuff. 



A few general remarks will close this brief sketch of the chief 

 rocks and minerals of the Circar. 



The Basalt of the range is much mixed up with Olivine and 

 Felspar, the presence of the latter causing the rock to disintegrate, 

 and become a very unfit material for building, as may be witness^ 

 ed in the crumbling walls and tombs around Aurungabad and Rau- 

 zah. 



The purple Amygdaloid rock is the characteristic one of the lower 

 levels, and in it are to be found the cave temples of Ellora and Au- 

 rungabad. 



Basaltic dykes abound throughout the Amygdaloid trap, varying 

 in thickness from a few inches, to twenty and upwards. Unlike 

 the dykes of Great Britain and Ireland, they do not appear to have 

 occasioned the slightest disturbance of the strata they have passed 

 through : around Aurungabad several striking instances of these 

 dykes are to be met with ; at one place in particular on the road 

 to Dowlutabad where the wall-like appearance, and prismatic structure 

 of the rock is distinctly disclosed b]|jhaving been cut through for 

 the high road to pass. It is observed to leave the range at about 

 two-thirds its way up, forms a sloping shoulder to the hill and des= 

 cending on the plain passes away in a south-west direction, its 

 course being distinctly marked by an upheaving of the plain. Other 

 good examples of these instrusive rocks may be seen ridging the sur- 

 face between Hursool, and the Delhi gate of Aurungabad. 



Silicious dykes are of common occurrence in the wacken beds. 

 Wherever they may have intruded, the rock on either side to the 

 distance of some inches, has become indurated and altered in color ; 

 silicious minerals are abundant upon the plateaux of the hills. In 

 the vicinity of Gowtala, Kunhur and Kauzah. Jaspideous clay stone 

 variously colored and Heliotrope are met with in great profusion and 

 beauty, as well as fine specimens of calcareous spar, and a peculiar 

 wiety of opaque calc spar of a pale green color is apparently so 



