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NEW YORK STATE MUSEUM 



Leverett, who speaks of seeing other evidences of lake work at 

 various levels from 30 to 60 feet over Erie. The writer also has 

 observed many such features that are too faint or uncertain to map. 



The most interesting of the hypo-Warren phenomena are those 

 which belong to Lake Dana and which include several of the 

 bars noted above. This lake had a level about 180 feet under 

 Warren. Its shore features are usually weak in western New York, 

 but can be found in favoring situations at the proper level. 



At Pine Hill cemetery, in the northeast part of Buffalo, and 

 northward near the city line, are well developed Dana bars, on or 

 over the 700 foot contour [pi. 23]. Northeastward in the town 

 of Alabama and specially in Elba there are spits on nearly all the 

 drumlins which rise above 700 feet. These are often indicated by 

 the numerous gravel pits, and are well displayed north of Elba 

 village. 



Through central New York the shore line retains the altitude of 

 about 700 feet, and strong bars occur west of Geneva and at Fayette, 

 east of Seneca lake. 



The shore phenomena of Lake Dana should be found throughout 

 the Erie basin at the following altitudes, which are determined by 

 subtracting 180 feet from the Warren altitudes in the corresponding 

 localities. 



Altitudes of the Dana plane in the Erie basin 

 Northeast of Buffalo, at 680 to 690 feet altitude 

 Buffalo, 660 to 680 feet 



South of Buffalo, 630 to 650 feet, or 60-80 feet over Erie 

 North Evans, 610 to 630 feet, or 40-60 feet over Erie 

 Evans, 600 to 620 feet, or 40-50 feet over Erie 

 Irving and Silver Creek, 590 to 610 feet, or 30-40 feet over Erie 

 Dunkirk, 575 to 595 feet, or up to 25 feet over Erie 

 Brocton, 575 to 585 feet, or up to 15 feet over Erie 

 Westfield, 575 feet and under, or at Erie level 



By comparison with the above table it will be seen that the bars at 

 North Evans are above the Dana plane, as are all the bars on the 

 lake bottom plain between Hamburg and Brant. But the bars at 

 Evans and north, the lower bars at Silver Creek, and the bars in- 

 the north edge of Dunkirk fall in the Dana plane. Many other 

 correlating features will be found by any one who looks for them. 



Deformation of the shore lines; land warping 



The shore lines of the ancient lakes must have been originally 

 horizontal, but they are not so now. In all the region of the 

 present Great Lakes the northward rise of the beaches is evident 



