60 WILLIAMS— DEEP KANSAN PONDINGS IN 



Torpedo. Pass. About 1,550 feet. Leads from Brokenstraw to present 

 Oil Creek basins. 



D. On the preglacial Upper-Lower Oil Creek Watershed. Dis- 

 charge of Titusville Ponding: 



Titusville. Trench. Top 1,610. Floor with gravel filling. Leads to Tio- 

 nest'a basin. 



E. On the East-West Sandy Watershed. Discharge of East Sandy- 

 Ponding: 



Foster. Trench. Top 1,500. Gravel filling of floor 900 feet. Leads to 

 West Sandy basin. 



F. On the Tionesta-Clarion Watershed. Discharge of Tionesta- 

 West Sandy Ponding: 



Emlenton. Trench. Top 1,450-1,480 feet. Floor with gravel filling to 

 860 feet. Leads into a short branch of Clarion River, probably Richey 

 Run, 4J/^ miles above its preglacial mouth. 



G. On Quaker Ridge, between the Conewango and Kinzua branches 

 of Allegheny River. Discharges of Allegheny ponding as the 

 glacial margin moved from the Conewango Valley up the spine 

 of this ridge, parts of which now rise above 2,200 feet — all into 

 the Conewango Ponding. From north of south. 



Kennedy. This is the present filled channel of Conewango Creek at the 

 debased end of Quaker Ridge. Top 1,250 feet. Rock floor probably 

 350 feet lower. 



North Bone Run. Trench. Ridge-top about 2,000 feet. Floor 1,582 feet. 

 A branch of the Kinzua, leading to Mud Run. 



Bone Run. Trench. Ridge-top higher than last. Floor i, 566 feet. Branch 

 of the Kinzua, leading to Cass Run. 



Storehouse Run. Shallow pass. Floor 1,925 feet. Leads to deep trench 

 from the east bank of Conewango Creek. 



Reynolds Run. Broad and swampy pass. Floor 2,020 feet. Leads to 

 Ackley Run by trench cut below 1,500 feet for 2^ miles into the flank 

 of Quaker Ridge. 



Big Bend. Trench. Top 2,154 feet.''' Floor probably 1,100 feet. Gravel 

 filling to 1,200 feet. Sheer trench walls rise to 2,040 and 2,060 on oppo- 

 site sides. The spine of ridge to west averages 2,100 feet. Leads to 

 Conewango Ponding. 



Of the above elevations, the only one concerning which there is a 

 difference of opinion is at Thompson. CarlP says "at least 1,800," 

 and Leverett,^ "at least 1,220." The former is too high, as then the 



