. Island life; or, the phenomena and causes of insular faunas and floras, including a revision and attempted solution of the problem of geological climates. ^ miles wide, encircling the whole island,usually at about thirty miles distance from the coast but in thenorth-east coming down to the sea-shore. The sea around Madagascar, Avhen the shallow bank on which itstands is passed, is generally deep. This 100-fathom bank is onlyfrom one to three miles wide on the east side, but on the west CHAP. XIX,] THE MADAGASCAR GROUP. 385. ^daxjrittjns MADAGASCAR, The Shaded Psirt shews the Elsvaied Gran I-
. Island life; or, the phenomena and causes of insular faunas and floras, including a revision and attempted solution of the problem of geological climates. ^ miles wide, encircling the whole island,usually at about thirty miles distance from the coast but in thenorth-east coming down to the sea-shore. The sea around Madagascar, Avhen the shallow bank on which itstands is passed, is generally deep. This 100-fathom bank is onlyfrom one to three miles wide on the east side, but on the west CHAP. XIX,] THE MADAGASCAR GROUP. 385. ^daxjrittjns MADAGASCAR, The Shaded Psirt shews the Elsvaied Gran I--^Cf^^on; the Black Vo/canicdistrictswhde Dense forests surround the Island 1 ?:0?0 SECTION ACROSS MADAGASCAR ON igrj. PARALLEL S. LATITt Si3=fe- >S ?tniH* Cf 386 ISLAND LTFE. [part ir. it is much broader, and stretches out opposite Mozambic[ue to adistance of about eighty miles. The Mozambique Channel variesfrom less than 500 to more than 1,500 fathoms deep, the shal-lowest part being where the Comoro Islands and adjacent shoalsseem to form stepping-stones to the continent of Africa. The500-fathom line includes Aldabra and the small FarquharIslands to the north of Madagascar; while to the east the seadeepens rapidly to the 1,000-fathom line, and then more slowly,a profound channel of 2,400 fathoms separating Madagascar fromBourbon and Mauritius. To the north-east of Mauritius are aseries of extensive shoals, forming four large banks less than 100fathoms below the surface, while the 1,000
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Keywords: ., bookauthorwallacealfredrussel18, bookcentury1800, bookdecade1880
