NEW YORK. 



85 



110. Portage. Here the railroad crosses the very deep gorge of the Genesee River on a high iron 

 Dridge 820 feet long and 235 feet high. There are three falls within a distance of two miles which 

 are 60, 90 and 110 feet high, hesides the intervening rapids. Two of them are visible from the car 

 windows on the north side. The bridge crosses the upper falls. The river pursues a meandering 

 course through this deep gorge and over these three successive cascades, descending more than 500 

 feet, and passes out into the Valley of the Genesee at Mount Morris. The gorge is 20 miles long 

 by the river, or 14 by the public road, and its depth in some places is not less than 350 feet, its width 

 only about 600 feet, and the banks nearly perpendicular. The place is well worth a visit. It is cut 

 out of the 11 a. Portage group, except the lower end, which is in the 10- c. Genesee shale. The 

 Portage group was named from this place. See note 112, Mount Morris. There is an ancient channel 



