WESTWARD REACH OF LAKE NEWBERRY 503 



Genesee waters these were at the Pearl Creek outlet, so exactly coincident 

 in elevation that a divided escape ensued until the nnblocking of the 

 Linwood channel established Lake Hall.^^ It should be noted that Hall 

 thus becomes a fairly fixed water body, not a series of lowering stages, 

 though it may have been let down once, some 20 feet, to the Stafford 

 channels. 



A NEW Genesee Lake 



Studies now proceeding on the complicated history of the Genesee 

 Valley lakes indicate that Lake Dansville was admitted into the Canan- 

 daigua Valley by way of the Hunt Hollow strait following Lake Naples, 

 and was then lowered down on this pass, instituting a new member in 

 the Genesee succession, here named the "Livonia Lake.'^ By opening of 

 the Bethany channels Livonia became the Mount Morris falling waters, 

 whose intricate history involved one more brief escape to the Canan- 

 daigua Valley by the Cheshire channels, as well as temporary separation 

 from the Wyoming Valley by lowering on the Pearl Creek outlet channel. 



Hudson Valley Lakes 



Greater interest attaches to the behavior of the Hudson- Champlain 

 Valley during ice-waning. Woodworth's interpretation^^ of this behavior 

 involved a peripheral bulge and a wave of uplift. Fairchild, whose early 

 conception of the uplift as a rigid tilting was opposed to Woodworth's, 

 has found independent evidence of the peripheral bulge in his work on 

 the Susquehanna Eiver.^^ Antevs, Daly, and others assert the existence 

 of the bulge and of lakes restrained behind it. Of these lakes one must 

 have occupied New York Harbor and its environs, perhaps continuous 

 with that in Long Island Sound; for this the name "Lake Manhattan" 

 is here suggested. As the ice waned and the pursuing bulge raised Man- 

 hattan, the Tappan Zee would have held a water body which we may call 

 "Lake Haverstraw." Perhaps even a third stage, north of the High- 

 lands, preceded the inception of Lake Albany, and this might suitably be 

 called "Lake Newburgh.'^ The writer finds it difficult to conceive that 

 any of these waters were salt, or with marine organisms. 



Lake Vermont and Lake Emmons 



It becomes necessary at this point to reinstate Woodworth's Lake Ver- 

 mont, for, like the preceding, this was sundered from the tides by the 



"Bull. 106. N. Y. state Museum, p. 33, pi. 6. 

 12 Bull. 84. N. Y. State Museum, pp. 229, 232. 

 " Science, n. s., vol. 57, no. 1465, p. 113. 



