3. W e know that the Hawaiian Islands were formed over a stationary mantle plume

Question

3. W e know that the Hawaiian Islands were formed over a stationary mantle plume. Given his knowledge, how can we explain the different ages of the islands as you move from NW to SE along the island chain. Figure 2 shows that the Hawaiian Islands are part of a ridge reaching from the island of Hawaii for nearly 6000 kilometers across the North Pacific to the Aleutian Trench. The ridge supports a long line of extinct volcanoes. Beyond the islands, the volcanoes are submerged and become deeper and deeper beneath the ocean surface as one sails further to the north. About halfway along its length the ridge bends to a more northerly direction. Eigure 2. The Hawaiian- Emperor volcanic change. Ages of volcanic centers are given in parentheses. 180 170 160 W 50 N t Semount 5.960 70.7) Shaded areas designate zones between sea surface and 2 km below sea surface + Topographic high Figures in parentheses: (km fro Kilauea/millions of years)! 40 N 40 N 3 500 1,000 kilometers ·Hawaiian-Emperor Bend SA?mount- 3.520 34 Midway siand (2,43227.2) 30 N a n Ri d g e Kauai (5195.1) Hawaiian Islands

Explanation / Answer

We can say explain the difference in the ages as we move from NW to SE along the island chain because the plate is moving towards the north east direction and since the plume is constantly pumping magma but due to this plate movement the zone which are having more age are on more North Eastern part of the map as compared to the recent one.

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