1182 The American. Naturalıst. [December, 
an elevation of 10,250, and Vancouver 8,500. Many other peaks in 
the same region are as elevated as Cook and Vancouver, but St. Elias 
is higher than any of its immediate neighbors. 
“ The more important glaciers and mountains in the region explored 
were named principally in remembrance of distinguished American 
geologists who are no longer living. One grand mountain, some 
thirty miles northeast of Elias, and probably only second to it in 
height, was named in honor of Sir William Logan, formerly Director 
of the Geological Survey of Canada. Several lofty spires to the east of 
Mount Logan were named after the vessels of the navy and the revenue 
marine that have become celebrated for their voyages in Behring Sea 
and the Arctic Ocean." 
The results of the expedition will be presented to the National 
Geographic Society some time in November, and as soon after as prac- 
ticable will be published by the Society in the ** National Geographic 
Magazine.’’—Philadelphia Ledger. 
GEOLOGY AND PALEONTOLOGY. 
The Transitional Drift of a Portion of Northern Iowa. 
—In a paper by the present writer on ‘‘The Glacial Drift and Loess 
of a Portion of the Northern Central Basin of Iowa,” ! which appeared 
in the NATURALIST a few months since, there was included in the ** Up- 
land Drift” an upper silt-like member. 
This member was not at that time recognized asa distinct formation, 
but upon more recent investigations and study is now apparently dem- 
onstrated to be. A description of this, we believe heretofore unrecog- 
nized, division constitutes the basis of the present paper. 
The area here under consideration includes that portion of Northern 
Iowa lying east of the double moraine, which enters the State from the 
north; and west of the Loess belt, which borders the Mississippi on 
the east. This formation is developed over broad areas of surface ; 
and where best developed and most easily defined the contour of the 
surface is usually of a subdued undulatory type. 
1 In this paper no allusion was intentionally made (except such as b necessary in 
ns 
now shown to represent a subsequent period. The Valley Drift was derived mostly from 
the materials composing the double moraines, and the Loess appears to mark the highest 
stage of water during the occupation of the first moraine. 
