452. J. D. Dana—‘'Kames” of the Connecticut River Valley. 
formation of the valley; gives the heights of the terraces 
above the river (and above mean tide) from careful levelings 
along its course, commencing near the source of the river in 
Connecticut Lake, 1618 feet above the sea; discusses the 
origin of the deposits and of their various features ; and pre- 
sents his very valuable topographical details on a ma p of the 
ome cuenta a series of plates. Besides the ordinary 
stratified drift, so that eee represent an intermediate stage in 
the progress of the era and call for special explanations 
The facts from the Merrimac Valley also are presented i in a 
similar way, and with like deductions 
In the study which I had made of Alp Quaternary of South- 
ern New England, and less perfectly of drift-phenomena else- 
where, I had been led to refer all the stratified drift above 
the till to the ii formation; and no later observa- 
Pung °§ answering to Mr. Upham’s “kames.” During the past 
I have been over the region of the Connecticut Val- 
eo aectee by Mr. Upham, in order to obtain a full under- 
standing of his facts, so as to be able to incorporate them with 
the knowledge I had previously acquired, ape here give an 
account of what I observed, with my conclusio 
That the subject may be rightly alestianig 125 e preface my 
statement with a brief mention, first, of some of the general 
facts respecting the fale drift- -deposits which I had gath- 
ered from personal study, and, next, of the facts and deduc- 
es ae are Pee out by Mr. Upham with relation to 
the ‘ 
—(1.) Seratched bowlders and till are almost ponent: 
England and 
so nearly to the surface of any terrace that the till outcrops. 
(2.) The layer of till of the hill-slopes is continued beneath 
oA terrace deposits; showing that along the valleys the till with 
e bowlders was generally api aotpoct first. 
* In the street adjoining my own house, in New Haven, a ones excavated for 
a sewer, passed pia ten feet of stratified drift, or of the terrace formation, 
and then 0 opened into a deposit of gravel and scra ratched stones  neaudine some 
bowlders of eight to ten cubic feet); and, below two or three feet of this kind 
of material, entered the Mesozoic sandstone of the region. This san np pes rises 
in a ridge, above the level of the terrace, 400 yards to the north of the excava- 
tion, and must have rear tei oth the shore and bottom of the ied ound at 
the time of the depositio 
