Connecticut Valley in the Champlain and Terrace Periods. 459 
Art. XLIX.—The Northern Part of the Connecticut a in the 
Champlain and Terrace Periods ; by WARREN UPHAM 
A CAREFUL exploration of the stratified drift bordering Con- 
necticut River on both sides, from its source to the north line 
of Massachusetts, has been made for the geological survey of 
New Hampshire. Much of the present essay, which is based on 
this work, will be published, with i lid details, in the 
7 volume of the report on that sur 
At the end of the Glacial period, chi wallop: like every other 
prominent valley in New Engla and, received thick beds of 
Sins sand and clay, or fine silt. These were deposited dur- 
The river-lands here to be considered include the interval, 
or present flood-plain, frequently known as meadow along the 
Connecticut, and called bottom-land in the western States; and 
terraces, which rise in steps on each side of the river, the high- 
est often form ming extensive plains. This highest ‘deposit ig 
found to have about the same height upon both sides, and to 
extend Sie Te ‘with early the same feiehey as that of the 
over me dis ances , however, sometimes shows a wwell- marked 
d and continuous flood-plain, now ‘bebe and st Pe 
swept away by the further porta of the channel. These 
terraces are almost always level-topped, and bounded at a 
* Tt will be seen that these terms are adopted from Prof. Jam Be re a, 
has given much attention to surface geology, and has YeOlhe he ue pro Pl 
nence the abundant deposition of drift, both stratified and ccteasinat goad ae the 
apparently in all countries, which en ove 
tinetly characterized as successive arate of glaciation, deposition and erosion 
