226 H. L. FAIRCHILB POST-GLACIAL UPLIFT OF N. E. AMERICA 



A few selected stations from Chalmers' tabulation of ancient marine 

 levels (8, M, pages 22-25) are given below in comparison with, the 

 theoretic altitude by the isobases of the map : 



Chalmers' Chalmers' Isobasal 



number. Station. elevation. value. 



NOVA SCOTIA 



20 Half a mile uortli of Nappan station, I. C. R 143.72 175 



23 Between Wallace Harbor and Pugwasli 133 140 



24 On peninsula north of Wallace Harbor, in several 



places, distinct 133 140 



25 East of Wallace, on road running south from 



Plaster Cove 138 135 



26 On Wallace Ridge, east of road going south from 



Plaster Cove, in several places 133 135 



30 At Thomson station, I. C. R 138 140 



31 On east side of Halfway River, at northern base of 



Cobequid ^Mountains 170 . 84 155 



31 At mouth of L. Quille Brook, south of Annapolis . . 110-115 110 

 42 Near head of Saint Marys Bay. at liase of North 



Mountain 110 110 



MAGDALEN ISLANDS 



53 On Amherst, Entry, Grindstone and Alright Islands 110-115 110 



LABRADOR AND NEWFOUNDLAND 



Fortunately we have for mapping of the uplift of the Labrador coast a 

 consistent set of carefully determined elevations of summit beaches by 

 Professor Daly (39), including three well distributed altitudes in N'ew- 

 foundland. These figures are the basis for the isobases of those provinces. 

 The isobases of 300 and 400 feet along the Labrador coast appear to 

 harmonize all of Daly's beach levels, and his figures are supplemented 

 by at least one observation by Professor Coleman. In a letter relating 

 to exploration in the summer of 1916 Coleman says: 



"The highest levels along the northern part of the coast where I was work- 

 ing are below those of the Saint Lawrence region. Four hiuidred and thirty 

 feet was the highest certain beach, in about latitude 56° 30'. From this north- 

 ward there is a lowering to 225 feet at Komaktorvik Bay, about latitude 59° 

 30', my most northerly point. 



"The beaches in Newfoundland seem higher than in the part of liabrador I 

 have studied, reaching 500 feet or more." 



Coleman's higher elevation does not harmonize witli the map, but his 

 lower figure, 225 feet, lying north of Daly's farthest and lowest station at 

 250 feet, is in perfect accord. 



