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1873年,英国“挑战者”号海洋考察船在进行环球考察时,在北大西洋加那利群岛的费罗岛西南约300千米处,从海里打捞上来一些黑色的类似鹅卵石的团块。奇怪啊!鹅卵石大都分布在海滨和浅滩,几千米深的大洋底部哪里来的鹅卵石呢?这一现象引起了科学家们的浓厚兴趣。经
In 1873, the British “Challenger” marine expedition flew some black pebble-like clumps from the sea at a 300-km southwest of Ferre Island in the North Atlantic Canary Islands during a global mission. Strange! Pebbles are mostly distributed in the beach and shoal, a few kilometers deep where the bottom of the ocean pebbles it? This phenomenon has aroused great interest of scientists. through