DUTTONSVILLE GULF. 



103 



the valley, it was turned to the left and found a new channel to the left of the 

 mountain lying east of Duttonsville. On Plate III a sketch of the region is laid 

 down, which will give some idea of the ancient and present courses of Black river. 

 But the published map of that region is so imperfect, that the following sketch, 

 taken by the eye, will probably present a better outline in part. 



During the drainage of the country a pond would occupy the basin B, at Dut- 

 tonsville, extending up the river as far as Proctorsville and perhaps even to Lud- 

 low, and the water would find an outlet at the lowest point. On the north side it 

 was kept in by a gravel terrace, extending to the rocky hill C, and as stated above, 

 the old bed at A was raised by a similar deposit. The result was, that the rocky 

 ridge at D, was the lowest point, and there the stream flowed over and commenced 

 its erosion of the strata. That work has gone on till a gorge has been worn back 

 half or three-quarters of a mile, and the work is now progressing in the hard 

 gneiss rock. According to my barometrical measurements the river falls in this 

 whole distance as many as 183 feet. 



As may be seen in Plate III, the old river bed, after continuing, about three 

 miles, towards Gassett's railroad station, forsakes the railroad track, and finds its 

 way to the present bed of Black river some seven or eight miles below Duttons- 

 ville. But a similar bed is represented as continuing as far as the Gassett station. 

 No pot-holes, indeed, occur along this ravine, but we cannot doubt that a stream 



