Archive image from page 243 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 208 DEPTHS OF THE OCEAN Rock frag- at depths ranging from 318 to 3420 feet during the expeditions of merits dredged ships 'Triton' and 'Knight Errant.' It suggests that the glaciated stones on the ridge are or have been embedded in a boulder clay. The stones are composed chiefly of Lewisian gneiss and the Moine sch
Archive image from page 243 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 208 DEPTHS OF THE OCEAN Rock frag- at depths ranging from 318 to 3420 feet during the expeditions of merits dredged ships 'Triton' and 'Knight Errant.' It suggests that the glaciated stones on the ridge are or have been embedded in a boulder clay. The stones are composed chiefly of Lewisian gneiss and the Moine schists lying to the east of the post-Cambrian displacements in the Highlands of Scotland. A large proportion consists of Caithness flagstones and other Old Red Sandstone rocks, like those occurring in place in the Orkney and Shetland ' Isles. A considerable number of Jurassic and Cretaceous types occur in the collection, together with two carboniferous specimens, the age of which is determined by their fossil contents. The assemblage of fossil- iferous stones are similar to those found by Messrs. Peach and Home in the boulder clays of Caith- ness and Orkney. On the Faroe Banks the volcanic rocks of the Faroe Isles are not re- presented among the rock fragments dredged, which would seem to point to the extension of the combined Scottish and Scandinavian ice- sheets over that part of the sea-floor during the glacial period. Just inside the Rock- all Bank, at Stations 100 and loi (' Michael Sars '), only one Old Red Sandstone boulder was found in the materials collected, but the sand grains occurring in the ooze are either red or green. The ooze also contained fragments of brown glass, resembling the slaggy volcanic rocks of Iceland. Such
Size: 3092px × 647px
Photo credit: © Actep Burstov / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1910, 1912, _michael_sars_north_atlantic_deep_sea_expedition_191, appell_f_jakob_johan_adolf_1857_, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, drawing, gran_h_h_haakon_hasberg_1870_, helland_hansen_bj_rn_1877_, historical, history, illustration, image, london_macmillan, murray_john_sir_1841_1914, north_atlantic_ocean, oceanography, page, picture, print, reference, vintage
