. The Earth beneath the sea : History . SCALE IN NAUTICAL MILES 400 Fig. 16. Profiles illustrating the marginal trench and outer ridge in the northern Caribbean. (After Heezen et al., 1959.) h. Island arcs Lying on the northwestern margin of the Pacific Ocean are a series of great island arcsâthe Aleutians, the Kuriles, the Japanese and the Marianas. The outer convex side of these island arcs is considered to be the seaward limit of the Asian continent by some petrologists because of the occurrence of andesite. However, consideration of other criteria, such as the depth of water or crustal thi

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. The Earth beneath the sea : History . SCALE IN NAUTICAL MILES 400 Fig. 16. Profiles illustrating the marginal trench and outer ridge in the northern Caribbean. (After Heezen et al., 1959.) h. Island arcs Lying on the northwestern margin of the Pacific Ocean are a series of great island arcsâthe Aleutians, the Kuriles, the Japanese and the Marianas. The outer convex side of these island arcs is considered to be the seaward limit of the Asian continent by some petrologists because of the occurrence of andesite. However, consideration of other criteria, such as the depth of water or crustal thickness, makes it clear that most of the great island arcs lie within the Pacific Basin rather than at the margin of the continent. The Phili])pine Sea is roughly

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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom