| 单词 | abyssal zone |
| 释义 | > as lemmasabyssal zone abyssal zone n. Oceanography the deep part of the ocean, now typically from a depth of 3000 metres (1.9 miles) down to 6000 metres (3.7 miles), though the numerical limits, esp. the upper one, vary.The term originally referred to a depth of 100 fathoms (approx. 183 metres) down to the lowest depth at which life is possible. ΘΚΠ the world > the earth > water > sea or ocean > region of sea or ocean > [noun] > deep place weelc897 sea dinglec1225 regort1477 ocean-deep1590 ocean depth1825 abyssal zone1852 abyssal1896 1852Abyssal zone [see sense A. 2]. 1884 Science 8 Aug. 116/2 Simple ascidians occur in very deep water, and are fairly represented in the abyssal zone. 1944 A. Holmes Princ. Physical Geol. ii. xv. 314 The muds, etc., of the continental slope, and of similar depths around oceanic islands, belong to the bathyal zone; while the oozes of the deep ocean floor belong to the abyssal zone. 1992 D. G. Campbell Crystal Desert i. 25 The Antarctic bottom water slithers far north on the belly of the sea, over the edge of the continental shelf and into the abyssal zones at the bottom of the oceans. 2010 E. Flügel Microfacies Carbonate Rocks (ed. 2) ii. 46/2 The abyssal zone seaward of the bathyal zone covers approximately 75% of the total ocean floor. < as lemmas |
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