358 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



trappean hill we may come upon the freshwater deposit at three di- 

 stinct elevations. There is first the stratum which underhes the nodular 

 trap generally throughout the plain, and which may be seen some- 

 times laid bare at the commencement of the ascent ; — then, after 

 passing over hard and soft amygdaloid, we come to another bed, 

 overlaid by nodular trap ; on gaining the top of this we reach a 

 terrace, which conducts us to another ascent, where we find ere 

 mounting to the summit a repetition of amygdaloid, sedimentary 

 rock, and globular basalt. An example of this occurs at the 

 hill of Gidsid, 40 miles S. from Nagpur, the top of which has been 



Fig. 3. — Section of Gidad Hill. 



East. West. 



a. Freshwater deposit, as seen in the plain, of a white colour. 



b. Freshwater deposit, of red colour, under the terrace. 



c. Freshwater deposit higher up, brownish green in colour. 



appropriated by the disciples of a Musalman saint, named Shek 

 Farid, to a mendicant establishment, which is supported by the 

 donations of Hindus and Muhammadans alike, from, all parts of the 

 Nagpur territory. See the accompanying section of the hill from east 

 to west (fig. 3), where a is the deposit in the plain, white ; b the same 

 stratum of a red colour under the terrace ; and c a repetition of it 

 higher up, brownish green. Whether there was a fourth stratum 

 above c, the quantity of brushwood and want of time prevented me 

 from observing. That all these strata are one and the same, though 

 they differ in hue, I have no doubt. When we become acquainted 

 with the changeableness of this deposit within a space of a few yards, 

 its different phases on the eastern declivity of Gidad Hill occasion no 

 difficulty. Near Katol, 40 miles N.W. from Nagpur, a similar 

 appearance is presented. There a thick stratum of red clay lies at 

 the foot of the hill, and we see its tendency to slope upwards and 

 lean against the ascent ; but we leave it behind, and come upon the 

 amygdaloid, which emerges from under it. The amygdaloid is over- 

 laid by a bed of red clay, which is surmounted by nodular trap con- 

 stituting a terrace. Above this, before we reach the summit, we 

 . meet with a succession of amygdaloid, red clay, and nodular trap 

 again. In ascending the ghat to GawilgaJ Fort, which however is 

 beyond the limits of our map, the same thing may be observed. 

 The slope is so steep, that the road is carried in a winding direction 

 up its face, and, although there are no terraces, yet, if I remember 



