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Geology please help?

The Aleutian arc extends westward from mainland Alaska into the Pacific Ocean. Profiles across four segments of the Aleutian arc are given in the graphs that follow, which show the positions of the volcanic arc and trench for each segment. Gray dots in the profile of the Amchitka segment show the earthquakes in the Wadati-Benioff zone.

Profiles across four segments of the Aleutian arc

GEOLAB4_EXFIG02.09.01

Click to view larger image.

The boundaries of the Wadati-Benioff zone track the progress of the subducted slab of lithosphere into the mantle, and the island arc sits directly above the point at which the mantle above the subducted plate begins to melt.

Part 1.c. At what depth does melting apparently occur beneath the Amchitka segment of the arc?

1 Answer

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  • Anonymous
    2 months ago

    "the graphs that follow" - so we are supposed to go find these graphs somewhre for you, where exactly are we supposed to look.  We can't just copy/paste the image tag into Google you know.

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