[5] 



ALBATROSS EXPLORATIONS. 



>07 



In many instances we have also dredged pebbles and small, rounded 

 bowlders of granite and other crystalline rocks from beneath the Gulf 

 Stream in deep water. These, I suppose, have been carried to that 

 region by shore-ice floating off in great quantities from our northern 

 coasts in winter and spring, and melting where the warm Gulf Stream 

 water is encountered. The coarser sands and gravel are probably car- 

 ried there in the same way, but the fine sand, in part at least, probably 



