THE DATE OF TEE GLACIAL PERIOD. 601 



A sycamore log was reported to me as found at Morgan- 

 town, Morgan county, Ind., thirty feet below the surface. 

 This is, however, in a stratified deposit, but one which was 

 evidently formed in connection with the last stages of the 

 Glacial period at that point. It is one quarter of a mile back 

 from the little creek running through the village, and the 

 glaciai limit is but a few miles south, on the higher lands of 

 Brown county. 



Again, near Seymour, Jackson county, Ind., logs of wood 

 are reported as occasionally found in digging wells in the 

 village at a depth of twenty feet below the surface. Sey- 

 mour is on a glacial terrace, in the line of one of the largest 

 glacial floods carrying off the melting torrents from the de- 

 caying ice over a good part of southeastern Indiana. The wide 

 terrace on which Seymour stands, and in which the logs are 

 found, is about sixty feet above the present bed of the East 

 Fork of White River, running through the place. Black- 

 walnut logs are also mined from the banks of the river in 

 low water. This instance is not probably decisive of the 

 age of the buried wood, as the terrace may be the product 

 of the so-called second Glacial period. Still, there can 

 be no doubt that the most recent glacial advance extended 

 to the borders of Brown county, which lies a little west of 

 the locality just spoken of, and which is nearly in the lat- 

 itude of Butler county, Ohio, alluded to in a previous para- 

 graph. 



Another most decisive instance of vegetable remains in 

 till near the margin occurs in Bigger township, in the south- 

 eastern corner of Jennings county, Ind. Here Mr. Burchill 

 reported to me the finding of wood in a well, twelve feet 

 deep, in a hard blue clay which, from neighboring exposures, 

 is, without doubt, true till. On another farm, near by, wood 

 was reported to me as found thirty feet below the surface in 

 a well that failed to reach the rock at that depth. This is 

 on as high land as there is in that region, and is about ten 

 miles north of Madison, on the Ohio River, and abont five 

 hundred feet above it. 



