Note 10 — Chapter I · GEOLOGY.
Reading edition
Sir James Ross and Captain Wilkes met with icebergs covered with mud and stones in the antarctic seas, and even in 66° 5ʹ lat. One block seen by Sir James Ross was estimated to weigh many tons.—Antarctic Voyages.—[Narrative of United States Exploring Expedition. By Charles Wilkes, U. S. N.].