710 PROCEEDINGS OF THE OTTAWA MEETING 



The first paper presented was 



GEOLOGY OF OTTAWA AND ITS ENVIRONS 

 BY H. M. AMI 



[Abstract] 



For the visiting geologists a series of lantern views were projected, showing 

 the geologic features about Ottawa; the stratigraphic succession, Archean 

 crystallines, Potsdam, Beekinantown, Chazy, Birdseye, Black River, Trenton, 

 Utica, Lorraine, Medina, and the Pleistocene deposits. The faunas of the sedi- 

 mentaries were briefly considered. 



The second paper was 



NOTES ON ARCTIC GEOLOGY 

 BY ALBERT P. LOW 



Eemarks were made by W. M. Davis and the author. 

 The third paper was 



OLDEST PRE-CAMBRIAN ROCKS 

 BY C. K. LEITH 



The paper was discussed by A. C. Lane, A. P. Coleman, and Arthur 

 Keith. It is published in a bulletin of the U. S. Geological Survey. 



The Society adjourned for the noon recess, and reconvened at 2.30 

 o'clock p m, with S. F. Emmons in the chair. 



The first paper of the afternoon session was 



GLACIAL HISTORY OF NANTUCKET AND CAPE COD 

 BY J. H. WILSON* 



[Abstract] 



Late Wisconsin ice-sheet occupied this region with two distinct lobes : First. 

 Nantucket lobe, with three stages: a, Nantucket stage; 6, Cape Cod stage; c, 

 Cape Cod Lake stage. Second. Long Island lobe, with two stages : a, Marthas 

 Vineyard-Block Island stage; b, Elizabeth Islands-Fishers Island stage. The 

 Nantucket lobe is shown to have come probably from as far as Newfoundland, 

 and to have extended at least 150 miles out to sea. Reasons for this are 

 numerous. Especially notable are: character <5f transported material, evi- 

 dences of glacial erosion over the area concerned, direction of motion of ice, 

 and character of the interlobate moraine. 



* Introduced by A. W. Grabau, 



