omenak's fiord. 55 
by, nearly opposite on the Atlantic side, as two thou- 
sand six hundred feet high, "forming ledges not unlike 
steps, on a gigantic scale," evidently a continuation of 
the same dioritic series ; while the syenites and strat- 
ified gneisses to the north have their corresponding rel- 
ative positions on both coasts. 
It is up this fiord, probably in the chasms of the 
trap, that those enormous glaciers accumulate which 
have made Jacob's Bight, perhaps, the most remarka- 
ble locality in the genesis of icebergs on the face of 
the globe. It is not uncommon to have the shore here^ 
completely blocked in by these gigantic monsters : I 
myself counted in one evening, the 3d of July, no less 
than two hundred and forty of primary magnitude, 
from the decks of our vessel. The inquiries I was 
enabled to make may perhaps throw some light on the 
causes of this excessive accumulation. 
I 
