Download PDF by Joseph L. (ed) Reid: Antarctic Oceanology I

By Joseph L. (ed) Reid

ISBN-10: 0875901158

ISBN-13: 9780875901152

ISBN-10: 1118664434

ISBN-13: 9781118664438

About The Product

Published via the yankee Geophysical Union as a part of the Antarctic study Series.

The Antarctic waters supply one of many severe units of features for the world's oceans. Its waters are chilly, low in salinity, dense, and excessive in dissolved oxygen, and, even though related values will be present in the Norwegian Sea, it's the out-flow from the Antarctic that fills many of the deep ocean basins of the area. The interplay of those high-latitude waters with these having the features of tropical or North Atlantic waters has lengthy been one of many significant reports of oceanology, but simply within the previous few a long time have we been in a position to start to acquire the ideal facts.

Recent advancements, corresponding to the reputation of the idea that of continental flow and sea ground spreading, have made the antarctic areas as vital to geologists and geophysicists as to actual oceanographers and biologists.


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Sample text

15 GOODELL, MEYLAN, AND GRANT 2 Copyright American Geophysical Union I Antarctic Research Series Antarctic Oceanology I Copyright American Geophysical Union Vol. 15 Antarctic Research Series Antarctic Oceanology I 36 Vol. 15 GOODELL, MEYLAN, AND GRANT Fig. 5. Concretionary masses of ferromanganese draped on submarine basalts in the center of the Drake Passage tion 59°14'S, tion 5-11). 68°49'W; The water bottom depth sediment carbonate ooze ( C a C 0 is 3 1963 f m ; (loca­ camera a yellowish sta­ (5Y7/2) Fig.

A population is here defined as a group of concretions, all of which are characterized b y sim­ ilar nuclei and ferromanganese oxide accumulation geometry collected in a single dredge haul or at a sediment core horizon. Multiple populations can oc­ cur in an area sampled by a single dredge haul, or even in the same core interval. The physical char­ 6 7 8 9 DIAMETER diameters from Eltanin Only whole concretions were dredges 10 11 12 (CM) (left) and cores tabulated. acteristics that were used to separate concretions into populations are ( 1 ) a visibly different nucleus type; (2) single versus multiple nuclei; and (3) a marked­ ly different oxide crust thickness.

The size gap between about 1 and 5 mm reported by Me­ nard [1964] apparently also exists over wide areas of the South Atlantic, Pacific, and Indian oceans and is probably related to the lack of suitable size nucleating material. When accumulations of 1-5 mm do occur, they are generally accreted as part of a larger multiplenucleus concretion. The largest nodule recovered to date aboard the Eltanin is a slab 56 X 55 X 14 cm that was dredged from the floor of the Southwestern Pacific Basin (Figure 1 4 ) .

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