410 



wells had its course entering AUistons Branch near its head-waters. The 

 present AUistons Branch, then, is the lower part of the main stream that in 

 former times principally drained the area now occupied by Flatwoods. 

 The map showing the main drainage, the main channel and its tributaries, 

 are inferences that can scarcely be avoided. There are indications, how- 

 ever, that portions were drained by underground channels to other streams ; 

 as, for instance, the extreme southeast corner, the eastern part of section 

 30 and the portions already mentioned near the northwest corner of the 

 region. The sinks of these portions are evidences that their drainage was 

 as it is now, and was only temporarily interfered with by the forces that 

 destroyed the old drainage. Very probably other portions of considerable 

 area were drained into the main channel from underground passages, the 

 water coming to the surface farther down in the form of springs. 



Next, the relation of Flatwoods proper with the adjunct south of 

 Stogsdill Pond will be considered. The lack of any deep well immediately 

 west of Stogsdill Pond leaves the data somewhat incomplete, but this 

 portion has an elevation of 820 feet, and it seems likely that bed-rock is 

 much higher here than either to the north or to the south. Bed-rock out- 

 crops at 760 feet one-half mile west of this portion, and it is found at 800 

 feet in Mr. Myer's well one-half mile southeast. Thus it is very probable 

 chat there was a divide between Flatwoods proper and the small adjunct 

 to the south. It must have been very low near Stogsdill Pond, for wells 

 Nos. 16 and 17 penetrate sand their entire depth, and No. 17 was said to be 

 eighty feet deep, but, as said before, the writer doubts the reputed depth of 

 this well. 



The region east of the Myer's well seems to have been considerably 

 filled, as indicated by well No. 20, and the sharp ravines which are etching 

 their way in the fiat area near by. Examinations of these ravines show 

 that they contain no bed-rock, but were rather grooved into the stratified 

 sand and fine gravel of which the flat area is composed. 



In the extreme southwest corner of section 1 is also a filled area, but 

 farther east bed-rock is found, and on top of the ridge there is no sign of 

 silt or sandy material. Undoubtedly the head of a stream reached into this 

 corner, near where the present stream is endeavoring to clean out the 

 filled-in material. Thus the evidence shows that a divide with a very 

 irregular summit once separated the adjunct basin from Flatwoods proper. 



Turning to the western edge of the adjunct basin, we find sharp 

 V-shaped valleys or ravines of McBrides Greek etching their way into the 



