THE 



JOURNAL OF GEOLOGY 



APRIL-MAY, iSg-j 



GLACL\L STUDIES IN GREENLAND. X. 



The Bozvdoi/i glacier. — The Bowdoin glacier is a lobe of the 

 great inland ice- sheet which descends from the north into the 

 head of the valley of Bowdoin Bay. It is joined on the east 

 by ice pushing in through the intervals between a row of 

 nunataks that lie on the plateau border. On the west it is con- 

 fluent with the trunks of the Tuktoo and Sun glaciers which 

 debouch into the broad flat valley at the head of McCormick 

 Bay. This is only separated from the Bowdoin Bay valley by 

 nunataks of which the Sierra and the Sentinel are the most 

 conspicuous. These lie in the lower part of the common valley 

 and have already^^been mentioned in connection with the Tuktoo 

 glacier (see sketch map, p. 668, Vol. III). No very precise 

 point can be fixed upon as the place of parting of the Bowdoin 

 glacier from the main ice-cap, but it may fairly be regarded as 

 having a length of six or eight miles. In its lower half it is 

 joined on the east by the Obelisk glacier which comes in below 

 the North nunatak and by the East Branch glacier which pushes 

 in more directly from the east on the south side of the Obelisk 

 nunatak. The East Branch glacier appears to terminate by lat- 

 eral wastage almost at the point of joining the Bowdoin glacier 

 and apparently never becomes really confluent with it. But the 

 Obelisk glacier blends with and becomes a part of the Bowdoin 

 glacier without being distinguished from it even by a medial 

 moraine. The Bowdoin glacier in its lower part has a breadth 

 Vol. v., No. 3. 229 



