214 H. L. FAIECHILD POST-GLACIAL UPLIFT OF X. E, AMERICA 



Altitudes of the earliest and highest Marine Levels 



Location. 



■ g 



Observed altit 



tides. 



Stream valley and station. 



Defi 

 nite 



Ap- 

 . 1 prox. 



1 ' 



Mini- 

 mum. 



Suco A'cillov ]>iixtoii 



525 

 GOO 

 630 

 605 

 495 

 570 

 715 



750 



525 



5':)5 

 575 

 645 

 435 

 560 

 610 

 560 

 500 

 465 

 555 

 395 

 595 

 675 

 700 

 250 



250 





) 

 ) 

 ) 

 ) 



410 



240 

 245 





( 'Ornish 









P>i*o\viifield 





Ossipee Valley Kezar Falls 





Portland Citv 





Audroseogi^iu Vallev. . . . Lewiston 





Bethel 



72( 

 71( 



S0( 

 70( 





(Jorham 





Kennebec Vallev Auirusta 





Waterville 



Skowhegan 



Bingham 









Penobsoot Valley Bangor-Orono 



Piscataquis River . . . Dover 





Kingsbiiry-Parrot 



Pleasant River Brownville Junction . . 



' Mattawamkeag River Mattawamkeag 



Danforth 





East Br.anch Ashland Junction .... 



Saint Croix Valley Vanceboro 



Saint John Vallev Van Buren 





Fort Kent 





Saint Francis 





Atlantic coast ( G. H. Isle au Haut 



225 



Stone). 



North of Machias 





• 



240 



UPPER 8AIXT LAWRENCE AND OTTAWA VALLEYS 



The evidences of salt water at high levels and of standing water at yet 

 higher levels are profuse in the Saint Lawrence Basin. These features 

 have heen the subject of study, especially by Chalmers (see the list of 

 writings). Most of the figures for occurrences of marine fossils and the 

 lieight of delta sand-plains are of value as minimum altitudes, and some 

 data are in close accordance with the theoretic altitudes. But glacial 

 and marine deposits were not discriminated; the summit features were 

 not clearly distinguished from inferior features, and the direction and 

 amount of land tilting or differential uplift was not determined. This 

 hick of discrimination and of • correlation over wide areas produces dis- 

 cordance in the published data and makes them inconclusive. These 



