...below 2,500 fathoms, and consists almost entirely of a silicate of the red oxide of iron and alumina. The transition is very slow, and extends over several...increases steadily in proportion until the lime has almost entirelydisappeared. This brown matter is in the finest possible state of snbdivision, so fine that...

...below 2,500 fathoms, and consists almost entirely of a silicate of the red oxide of iron and alumina. The transition is very slow, and extends over several...and assume a kind of 'rotten' look and a brownish color, and become more and more mixed with a fine amorphous red-brown powder, which increases steadily...

...silicate of the red oxide of iron. The transition from the Globigerina-ooze into this class of deposits is very slow, and extends over several hundred fathoms of increasing depth, the shells gradually losing their sharpness, and assuming a kind of rotten look and a brownish colour. They also become...

...shells of the Foraminifera can still be detected, but they have lost much of their sharpness of outline, assume a kind of rotten look and a brownish colour, and become mixed with a fine amorphous redbrown powder. As the depth increases the proportion of this powder grows...

...shells of the Foraminifera can still be detected, but they have lost much of their sharpness of outline, assume a kind of rotten look and a brownish colour, and become mixed with a fine amorphous redbrown powder. As the depth increases the proportion of this powder grows...

...size of large nodules, of peroxide of manganese; and in volcanic regions, or in their neighborhood, with fragments of pumice. The transition is very slow,...shells gradually lose their sharpness of outline, assume a kind of 'rotten' look and a brownish color, and become more and more mixed with a fine amorphous...

...below 25oofathoms,^and consists almost entirely of a silicate of the red oxide of iron and alumina. The transition is very slow, and extends over several...and assume a kind of ' rotten' look and a brownish color, and become more and more mixed with a fine amorphous red-brown powder, which increases steadily...

...silicate of the rod oxide of iron. Tho transition from tho Globiyerina-oozo into this class of deposits is very slow, and extends over several hundred fathoms of increasing depth, the shells gradually losing their sharpness, and assuming a kind of rotten look and a brownish colour. They also become...

...depths below 2,500 fathoms, consisting almost entirely of a silicate of redoxide of iron and alumina. The transition is very slow, and extends over several hundred fathoms of increasing depths. Wyville Thompson, director of the civilian staff of the " Challenger " Expedition, concludes...