196 J. D. Dana—The Flood of the Connecticut River Valley 
had a passage east of Mt. Toby, and a very wide one west of 
Sugar-Loaf. ere are like objections to the location of dams 
at other places. Mr. Upham says, on this point, especially with 
reference to the part of the valley north of meee Ea ip that 
the idea of dams oe the valley is not sustained by the topog- 
velocity that would admit of epee depositions of sand 
throu ugh all the valley and of cla Pies 90 in yet sone to nee 
C. gil and i cue changed relations in the level of the 
land and se 
a. Rounes of a change afforded by the heights of Elevated Sea- 
beaches.—The fact of a wide difference between the flood era 
and modern time along the coast region is put rar eyond question 
by the heights above existing tide-level of shell-bearing beach- 
eposits. 
he facts are well known. The more important are here 
tabulated :* 
Latitude. Height. 
New Haven or New eae On Phe. Pounds ue 41° 14’ 15 to 25 
Sankaty Head, Nantuc rs ie if 
Point Shirley, near Baan 42°19” 75 to 100 
aga gris oe x 44°" 6’ 200 
WS sa nie ates 44° 207 217 
Crise, ve ‘a N. of Burlington, on L. Champlain), -. - 44° 337 335 
Middlebu os ipoee one Mie . 44° 10’ 403 
Monteal. Pep eaten Pema rere Ne 45° 31’ 520 
oulements, on St. Lawrence River, 47° 30 
Murray Bay, on Se Tawiehte River 2 47° 45’ { about ” 
The facts prove (1) a difference of level compared with tide- 
~~ between the era of the beach-deposits and the present; 
d (2) an increasing amount of difference northward. They 
are all from the coast it is true, but from the coast of the 
northwest side of New England as well as from its. eastern, 
southeastern and southern borders; and in view of their wide 
geographical range, and especially the fact, ames made mani- 
fest, that the valley of the Connecticut must have had dimin- 
ished oer during the era of the flooded river, we “ome believe 
that the interior of New England aries the changed re- 
* The heights at Eboulements and Murr have 
received from J. W. Dawson, of Mewitael The beds at Middlebury, —— 
C. H. Hite: 
h 
heights on Long Island age (north side) are based on stratified deposits along 
or near the Sound, but not shell-bea ~ The shells in the Mt. Desert deposits 
indicate a considerable tone of wate: 
