Notices respecting Diluvial Deposits. 19 
Lake Ontario, or through the stupendous chasm at the Little 
Falls. 1 shall give many more localities in confirmation of 
the hypothesis of diluvial deposites, in the Canal Report. 
6. 
terpreted the descriptions given by others. Although I con- 
versed with a number of scientific friends several years ago on 
this subject, and although I have examined two or three thou- 
uently, 
the finest sediment was deposited upon every formation which 
Was then uppermost. 
Facts. All elevated plains, from which the original] forests 
have not been removed and whose surfaces have not been dis- 
turbed, are now covered, immediately beneath the vegetable 
mould, with a mantle of fine earth, finest at the surface, and 
this is every where nearly similar, and unlike the stratum 
upon which it rests. It is most perfect, as far as I have ex- 
amined, upon that variety of crag, which American Agricul- 
turists call hardpan. Almost the whole of the vast tract of 
land called Hardenbur patent, west and southwest of Cats- 
kill mountains, containing several million acres, and most of the 
high ranges in N ew-England, and the lands west of Lake 
Champlain, present a most perfect example of the hardpan 
crag covered with this ultimate diluvion. 
7. Hypothesis. Antediluvial animals were few on. this 
nal, I carefully investigated, aided by three accurate assistants, 
his is four hundred feet in extent. 1} cause: two important 
“averns to he minutely examined in the Helderberg, by three 
