THE TRAP FORMATION OF 



Wacken with fibrous carbonate of lime and ditto in veins with 



calcedony, .... • • • • .... 



An amygdaloidal wacken similar to the toadstoneof England, 



Total to the water, 49 3J 



ic The difference iri depth that occurs in the vallies, before the water is 

 attained, arises from the form of the vallies being always concave, and the 

 basaltic black mould deepest in the central parts. The soil, whatever is 

 its occurring thickness, must be pierced, and also the indurated wacken 

 or basalt, which ever it may be, and then the water is found resting on 

 wacke' clay or amygdaloid. — The sand-stone keeps up the water even to 

 a higher level than the amygdaloids of the vallies ; — ^and the occurrence 

 of either of these rocks forms all the phenomena of water in these districts. 



Proceeding from the centre of the cantonments of Sdgar, and travel- 

 ing westward, you descend and cross the flat, which is the general parad- 

 ing ground, and at its confines, you come to a small isolated rise of sand- 

 stone on your right, on which is built a fewsaA godown and a bungalow, 

 and on the left a ridge, a branch from the sand-stone forming the basin of the 

 Sdgar lake ; passing the town, and a little beyond the wall on the western 

 side, a rivulet is crossed ; then the road leads by a gentle ascent for 

 two miles, to a low swell of trap, through a gorge or opening in which you 

 enter the valley of Bapyle, and find a trap range close on your left, and 

 one of sand-stone on your right, five or six hundred yards removed, form- 

 ing the southern and northern sides of the valley. This valley is the prac- 

 tice ground of the Artillery, and must be at least three miles in length. 

 At the western extremity another range of sand-stone occurs, either end of 



which 



