Vol. i No. 9.] The Geology of the Gangétic Plain. 233 
N.S.] 
exists in the Benares District opposite Saidpur. I have not had 
an opportunity of verifying the statement, and have not therefore 
shown it on the map. 
: r, Oldham’s is the only possible explanation, viz., that the 
river Ganges has gradually eroded the land at some bend in its 
course till it has cut into the course of the affluent at a point 
above the former confluence. 
hen once a channel had been made into the course of the 
affiuent, centrifugal force would drive the water of the Ganges 
through the breach so made, and the new channel would rapidly 
be widened out till it became the main course of the Ganges. 
Ganges usurping the course of Kirmnasa, and that opposite 
Saidpur by the usurpation of the course of th ; 
imilarly, tradition, which am considered trust- 
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present bed of the Gogra 
ny such usurpation of another river’s course would probab- 
ly completely alter the set of the current at the old confluence, 
and release the river from the bends in the old alluvium which 
At the commencement of th 
proved that the area at the mouth of the Ganges was an area o 
_ There are, however, indications that within the area of the 
United p O 
of the casing, itself 24 feet above the surface of the ground. — 
This shows that the lower strata must be inclined, though it 
does not indicate the directi i 
ection of the dip. : 
A imala: own to have risen and the Gangetic 
_ As the are kn a “ 
Plain to have sunk, ike probability is that the dip of the strata is 
m north to so 
I xcavated a channel — 
with th +a ither bank, the whole allu- 
. © watershed equidistant from either © ised ak sights 
at the slope into 
