, THE TliAP FORMATION OF 



perpendicular, or overhanging at the sides and ends of the hill. To the cubic 

 masses succeed a stratum of slate, after which again the massive in large 

 blocks ; both these covered by the debris, which I have spoken of, as form- 

 ing an easy slope to the sides and ends of the hills, easy as to the length, 

 but of troublesome ascent, because of the looseness of the component ma- 

 terial. Such is the hill of Satgerh, surrounded on all sides by the trap, 

 and such too is the predicament of every sand-stone hill, throughout this 

 trap formation, with exception to a continuous stratum of slate, which of 

 course is comparatively of infrequent occurrence, though small nests, or 

 patches of it will always be found in almost every sand-stone hill exhi- 

 bited through the trap. 



A conglomerate or breccia, having an argillo calcareous paste, colour- 

 ed red by the oxide of iron, and enveloping angular pieces of various sizes 

 of the proximate rock, will often be found at the feet of these isolated 

 sand-stone hills if a streamlet winds its course near ; or there will be at 

 such points, pudding-stones, and breccias, varying in color and aspect 

 from this described, and occasionally too in having an argillo siliceous 

 instead of a calcareous paste ; but neither these nor that just described, 

 are of any geological importance whatever, and the same may be said of 

 the trap tuff. 



Whether a well be sunk in the trap, or the sand-stone, the water is 

 always found at a very easy distance. It may often be come upon, even dur- 

 ing the dry season, within three feet of the surface in the vallies ; some- 

 times it will be so low as twenty-five feet, whilst the medium is about 

 twelve, and from that to fifteen. It is the toad-stone that limits the depth 

 if the well be excavated in the trap the sand-stone is of itself sufficient- 

 ly consolated and retentive if the shaft has been sunk in it. If the edge 

 of a hill or swell is pierced, of course the vertical height of such swell or 



hill 



