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Surface manifestations

Figure 4.2 Linear chains of volcanic islands, seamounts and ridges in the Pacific which are related to hotspots. The younger islands in the chains are always to the east.

Table 4.2

Swell

Crustal age (Ma) Residual depth anomaly at centre (m)

Width of swell (km)

Circular or Elliptical

Bermuda

Cape Verde

Cook-Austral

Crozet

Marquesas

Reunion

Society

Ridges

Hawaii

Iceland/Greenland

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