Art. 1.] Fowke, Pre- Glacial Drainage near Cincinnati % 
On the west side of the col (D) headed a ravine which fol- 
lowed the present bed of the Ohio to North Bend, the most 
northern point of this river below the mouth of Kanawha. At 
North Bend this creek or ravine cut through the hill to the 
north and entered what is now the bed of the Great Miami. 
From this point it may have followed the line of that stream 
northward and joined old Laughery creek in the vicinity of (E); 
or it may have continued a westerly course and fallen into old 
Laughery near the point (F). If the latter was the case, 
another ravine headed near by and flowed north along the 
Great Miami to (Ej. Further research will determine this 
drainage line. 
Just west of North Bend was another col, at the point (G); 
but it seems to have been a continuation of the hill on the south, 
with a uniform slope across the present bed of the Ohio, form- 
ing the water-shed between the last mentioned ravine and old 
Laughery, and not a low divide between the heads of two smaller 
ravines tributary to these. Below this point, the mouth of the 
Great Miami is reached, in an ancient channel whose drainage 
is now reversed. 
Proceeding down the Ohio, it will soon be found that this 
old stream had two main branches : one of them Laughery 
creek, now flowing into the Ohio two miles below Aurora ; the 
other a creek rising somewhere near Sugar Creek Landing in 
Gallatin county, Kentucky, (K). Going up the river from this 
point, it will be observed that the valley gradually .widens to 
the mouth of Grant’s creek (J),' where it is much wider than at 
any other place on the map ; from here, high and wide bot- 
toms on the Kentucky side extend as far as Petersburg (H). 
This greater width does not, however, properly belong to the 
eroded portion of the valley but is due to the fact that low foot- 
hills, produced by several ravines coming in along here, have 
been covered with glacial drift. 
At (I) is “ Split Rock,” concerning which more is to be 
said. 
Back of Petersburg is an abandoned channel (H), filled 
with drift and safe from the highest floods. 
