Stevenson, j —./—i [A.ug. 15, 



Btroyed by erosion on the cast side of the Monongahela, though it is still 

 shown on the west side. The higher benches are almost equally distinct 

 on both sides of the river. Polished fragments occur in great numbers up 

 to the line of the fourth bench and, even at that elevation, many of them 

 are of enormous size. 



Crossing the Ferry at Point Marion and taking the hill-road to New Ge- 

 neva, at the mouth of George's creek, one reaches the third bench at half 

 a mile from the river. It is covered by coarse sand mingled with clay, 

 which has boulders freely distributed throughout its whole mass. Such 

 fragments are numerous up to 280 feet from the water's edge, the line of 

 the fifth bench. The eighth bench is reached at somewhat more than a 

 mile from Cheat river, and at the first cross-road it bears a deposit of sand 

 whose thickness has not been determined. A flat-topped hill near this 

 place marks the level of the ninth bench. 



The fifth bench is of interest here. It is reached on this road very soon 

 beyond the divide separating George's creek from Cheat river. There it 

 bears a valuable fire clay with pockets of excellent glass sand. The irregu- 

 larity of the deposit is shown by sections obtained in two neighboring pits- 

 The one shows : 



1. Sand, clay, etc 11 feet. 



2. Sand, white, very clean 3 " 



3. Clay, ferruginous, sandy 1 foot. 



4. Clay, black, very good 1 " 



5. Clay, white, good, but containing ferruginous streaks 7 feet. 



6. Clay, ferruginous, seen 10 " 



Total 33 feet. 



The other section is : 



1. Sand, clay, etc 8 to 10 feet. 



2. Clay 3 to 10 " 



3. Ferruginous conglomerate ft. 1 inch. 



4. Glass sand 6 feet. 



5. Sand, inferior unknown. 



Respecting the thickness of the ferruginous clay, No. 6 of the first sec- 

 tion, nothing is known further than that at 10 feet from the top the tools 

 used in boring became hopelessly fast. An attempt was made to bore 

 through the sand, No. 5, of the second section, but the tools could not be 

 pushed beyond 15 feet. 



At a little distance beyond the pits, the third bench of the Stewartstown 

 series is reached, but the fourth bench has been masked by erosion so that 

 the wash from the thick deposit on the fifth covers the place of the fourth 

 and becomes continuous with the deposit on the third. Throughout the 

 deposits on both benches, transported fragments are found in vast numbers. 

 A well digged on the third bench is 23 feet deep and does not reach the 

 bottom of the sandy deposit. At a little way beyond, the bottom of the 

 sand is readied and the thickness to the rocky shelf is shown to be 35 feet. 



