SUMMARY OF DATA RELATING TO THE LAKES. 357 



TA B ULA TION OF DATA. • 





Present lake or stream. 



Altitude above 

 sealevel. 



Estimated dimen- 

 sions. 



Names of extinct lakes. 



i 



o 



o 



Q 



s 







1. Attica 



Tonawanda creek .... 







Feet. 



Miles. 



Miles. 



2. Warsaw 



Oatka creek 













3. Genesee 



Upper Genesee river. . 













4. Dansville 



5. Scottsburof 



Canaseratra creek 



Conesus lake 



1,200=1= 

 900± 



1,250± 

 9^0+ 



500 

 150 



24 



12 



2 

 2 



6. Springwater 



7. Glacial Canadice 



Hemlock lake .... 





Canadice lake . . 













8. Glacial Honeoye, . . 



9. Bristol 



Honeove lake 













INIud creek 













10. Naples 



Canandaigua lake . . 

 Flint creek 



1,340± 



(?) 



800 



13 



2 



11, Flint 





12. Hammondsport 



13. Watkins 



Keuka lake 



1,125 

 900 

 975 



1,158 



961 



1,020 



600 

 1.000 

 1,100 



24 

 30 

 35 



2 



Seneca lake 



5 



14. Ithaca . 



Cayuga lake 



6 



15 Groton 



Owasco lake 





16. Glacial Skaneateles. . 



Skaneateles lake .... 













17. Glacial Otisco 



Otisco lake 













18. Tiilly valley 



Onondaga creek 

























ALTITUDES. 



The figures for altitudes given in the table are mostly from personally 

 conducted spirit-level measurements, using railroad or lake altitudes as 

 datum-points. The determination of accurate heights was the most diffi- 

 cult part of the work. The doubtful figures are marked + or — . They 

 are discussed in the paper and, at the worst, are not far wrong. Allow- 

 ance must be made for the indefiniteness of the shore phenomena. Those 

 depended upon in this study are chiefly the terraces of deltas accumu- 

 lated where streams poured into the extinct lakes at high levels, and they 

 represent planes at an uncertain and variable number of feet above the 

 water-surface. 



Description of the Map. 



For the accompanying map (plate 18), the United States post-route ma]) 

 of New York has been used as the base. The water-partings between 

 the several hydrographic basins and the smaller streams heading upon 

 the divides have been carefully represented. 



The numerals all indicate altitude aljove ocean level, and are the result 

 of much study and correlation of data. In several cases they supersede 

 formerly recognized altitudes. The altitudes on the divides are in nearly 



