92 Kansas Academy of Science. 



Veneered Hills. — These are hills of rock coated somewhat 

 uniformly with till, the surface conforming approximately to 

 that of the underlying rock. These differ from the last two 

 formations mentioned in that they have a much more uniform 

 distribution over the rock embossments and in the subordina- 

 tion of veneering of the preexistent contour rather than the 

 formation of a new contour. 



Till Billows. — These differ from true drumlins in their 

 want of conformity to axes lying in the direction of the drift 

 movement; and in that they are arranged more closely to- 

 gether, are disposed more irregularly, and are connected with 

 each other by saddles or cols. The type graduates into sub- 

 marginal moraines. They seem to be intermediate between 

 submarginal moraines and drumlins. 



Irregular Till Hills. — These hills are aggregations of till 

 that seem to pay no respect to laws of symmetry or systematic 

 principles of growth. Their genesis is wholly in doubt. 



SUBGLACIAL STREAMS. 



These are streams that run beneath the ice-sheet. Their 

 action is not unlike that of any other stream, except that 

 it may be occasionally dammed with ice or may not keep the 

 center of the valley, as non-glacial streams do. They are 

 crowded from the center by the ice or even compelled to cross 

 the valley from side to side time after time. 



DEPOSITS OF SUBGLACIAL STREAMS. 



OsARS. — An osar is a long, continuous, serpentine ridge of 

 glacial sand or gravel, sometimes carrying boulders superfi- 

 cially, extending down valleys in the direction of glacial move- 

 ment. Ridges of this sort are sometimes called serpentine 

 kames. The following are some of the varieties : 



Short Isolated Osars or Eskars. — Ridges of this type are 

 the simplest form of glacial gravel. They have here been 

 called "isolated" because no other glacial gravels are known 

 to be near them. They have the form of a cone, a dome, or 

 often a short ridge, or sometimes several short ridges having 

 a linear arrangement (lengthwise of the ridges), or occa- 

 sionally a few somewhat parallel ridges inclosing basins 

 They vary in length from a few feet up to a mile or two. A 

 distinguishing feature of the class is that they have no fan- 

 shaped or elongated delta showing assortment of gravel. 

 From the observations it would seem that these osars were 



