250 GLACIAL FORMATIONS OF ERIE AND OHIO BASINS. 



"many bowlders, cobblestones, and a little metamorphic gravel." One 

 granite bowlder 2 feet long and 1 foot in diameter was noted. 



Wright lias found on a terrace back of Middletown, on the south side 

 of the Ohio 12 miles below Pittsburg, rolled stones and an occasional 

 pebble of granite at 250 to 280 feet above the river. For several miles 

 below these points terrace renmants are very small. 



Near the mouth of the Beaver extensive terrace remnants appear. One 

 back of Phillipsburg, soutli of the Ohio River, carries gravel at an altitude 

 about 310 feet above the river, or 975 feet above tide, and one back of 

 Beaver, on the north side, has a gravel deposit at equally high altitude. 

 This was well exposed by trenches for waterworks at the time the writer 

 last visited that locality (in 1898), and several granite rocks, ranging in 

 size from nearly a foot in diameter down to small pebbles, were found in 

 the material thrown from the trenches. The depth of the gravel is about 

 15 feet, and it is capped by a reddish, sandy clay 8 or 10 feet in depth. 

 These terrace remnants at Phillipsburg and Beaver apparently stand a;t 

 about the original level of the gravel filling. There is another terrace in 

 that vicinity, 75 to 100 feet lower, which carries an old glacial gravel, but 

 it was probably cut down from tlie level of the high terrace. This is 

 described by White as the "Fourth terrace," and is well displayed at 

 Rochester and New Brighton. 



Just above Industry, on the north side of the Ohio, is a terrace or rock 

 shelf, standhig about 275 feet ab(ive the river, on which a few waterworn 

 pebbles were found, including a quartzite 9 or 10 inches in diameter, and a 

 gneiss about 3 inches. 



From Industry, Pa., down to East Liverpool, Ohio, there are only 

 occasional small remnants of the highest terrace, and none of these were 

 closely examined. At East Liverpool the reservoir for waterworks stands 

 on a terrace about 300 feet above river level. On this terrace there is a 

 gravel deposit of considerable depth. Another terrace, which is also capped 

 by old gravel, occurs about 200 feet above the river, but this apparently 

 was cut down from the level of the high terrace. There is reported to be 

 an extensive remnant of the 300-foot terrace on the south side just above 

 East Liverpool, biit it was not examined by the writer. A small remnant 

 also appears on the south side below East Liverpool. Below that point the 

 old terrace is well displayed on the north side back of Wellsville, Ohio. 



The next terrace remnant examined is found on the West Virginia side 



