170 PLEISTOCENE OF INDIANA AND MICHIGAN. 



observations thus indicate that there are at least six or seven weak ridges inside of the main 

 front ridge of the Fort Wayne moraine. 



The investigation on the north side of the Maumee Valley was less complete than that on 

 the south side, but two and possibly three such ridges were found and two others seem to be 

 indicated by the drainage lines. One moraine in particular is clearly developed just west of 

 Bryan above the upper Maumee beach and was easily traced northeast to a point east of 

 Alvordton and southwest to a point beyond Farmers Center. Throughout the whole distance 

 this moraine is bordered along its front by a sharply cut drainage channel one-eighth to one- 

 fourth mile wide, and it crosses divides between streams without interruption. The investi- 

 gation was not carried far enough, however, to make sure of its identity southwest from 

 Farmers Center. Faint morainic fragments between Fanster, Ind., and Link, Ohio, on the 

 north side of Maumee River appear to be a northeastward extension of the moraine southeast 

 of Gar Creek and possibly connect with the moraine west of Bryan; but this correlation is not 

 yet established. 



The country slope from the mam ridge of the Fort Wayne moraine is shorter and there- 

 fore steeper on the north side of Maumee River than it is on the south side. From this fact it 

 would be expected that any weak moraines on the north side would be more closely set together 

 and perhaps less readily distinguished as individuals. So far as made out the series on the 

 north side seems to correspond in a general way to that on the south side, indicating a symmet- 

 rical disposition of the ridges; but actual identification was not made. 



Minor drainage concentrates along a line running north from Sherwood and turning grad- 

 ually eastward past Ney and Glenburg. This line was found on examination to be charac- 

 terized by scattered low knolls and scattered bowlders protruding from a plain composed 

 largely of lake clay without bowlders. This apparently marks the course of another moraine 

 distinctly inside the Gar Creek ridge. It is not improbable that still another, perhaps largely 

 concealed under lake clay, runs south between Powell Creek and Auglaize River. If there is a 

 moraine between these streams it probably passes near Arthur and Continental, crossing the 

 Blanchard River near Leon and curving gradually eastward north of Kalida and Pandora. 

 The drainage strongly suggests a faint drift ridge in this position, but it has not yet been fully 

 traced in the field. The moraine west of Bryan is perhaps to be correlated with the "Middle 

 moraine," or outer Defiance ridge, which Mr. Leverett 1 found between the Fort Wayne moraine 

 and the inner Defiance ridge in the Ann Arbor area. 



Although incomplete, this investigation shows that the Fort Wayne moraine like the Port 

 Huron morainic system is composite and is made up by the merging together of a number of ridges 

 into a single broad belt. The Defiance moraine in Ohio has not been studied from this point of 

 view, but its breadth and strength strongly suggest composite form also, and it is known to be 

 double in part of the Ann Arbor quadrangle. The Defiance, however, is so extensively water- 

 laid that its constituent ridges may not be distinguishable, unless in such forms as the faint 

 bowldery belts which Sherzer has found in Monroe and Wayne counties, Mich. 



WELL DATA. 



By Frank Leverett. 



Dekalb County. — Over the greater part of Dekalb County a sheet of till extends to an 

 average depth of about 50 feet. Below the till the drift appears to be largely sand and gravel. 

 The gas-well boring at Butler, in the northeast part of the county, is reported by Dryer to have 

 penetrated the following beds. The compact clay near the bottom of the drift and the overlying 

 red quicksand are probably pre- Wisconsin. It seems not unlikely that much of the great body 

 of gravel and coarse sand is also pre- Wisconsin. 



i Ann Arbor folio (No. 155), Geol. Atlas U. S., U. S. Geol. Survey, 1908. See also revised edition of 1915 and p. 280 of present report, -where 

 the names outer Defiance ridge and inner Defiance ridge are applied. 



