. Discovery reports. Discovery (Ship); Scientific expeditions. DESCRIPTION OF THE ISLANDS: SOUTHERN THULE GROUP 179 Islands are covered deep in glacier and the way in which they have been formed would probably have been misinterpreted, or have remained obscure, were it not for an inter- esting discovery which we owe to our echo-sounding apparatus. With this apparatus we found that a very deep basin exists between Cook and Thule Islands in Douglas Strait.^ In the middle it has soundings of over 400 fathoms, while at the north and south 4S 46 " n 91 „ 1» 15(, 1,2 159 81 125 178 lb5 158 HS 1
. Discovery reports. Discovery (Ship); Scientific expeditions. DESCRIPTION OF THE ISLANDS: SOUTHERN THULE GROUP 179 Islands are covered deep in glacier and the way in which they have been formed would probably have been misinterpreted, or have remained obscure, were it not for an inter- esting discovery which we owe to our echo-sounding apparatus. With this apparatus we found that a very deep basin exists between Cook and Thule Islands in Douglas Strait.^ In the middle it has soundings of over 400 fathoms, while at the north and south 4S 46 " n 91 „ 1» 15(, 1,2 159 81 125 178 lb5 158 HS 140 I6S 45 J2J16. 15 17 \X> 31 i 51 M J4 21 28 / 19 IS. SEA mix 42 60 f>9 71 '9 Fig. 16. Chart of Douglas Strait, Southern Thule, showing soundings in the submarine crater. entrances there is less than 20 fathoms. That the basin was once a volcanic crater scarcely admits of doubt. It is probable that by its eruption it originally formed one large island, and that of this island Cook and Thule are the only portions now remaining. 1 Rear-Admiral H. P. Douglas, , , member of the Discovery Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Institute of Oceanographic Sciences (Great Britain); National Institute of Oceanography; Great Britain. Colonial Office. "Discovery" Committee. London, New York, Cambridge University Press
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectscientificexpedition
