Passage V
Heat flow is the escape of Earth's interior heat through the lithosphere (crust and upper mantle combined). For a given thickness, high heat flow indicates a rapid temperature increase with depth. Figure 1 is a cross-sectional view of oceanic and continental lithospheres.
Figure 2 shows heat flow, in watts per square meter (W/m2), for parts of the oceanic lithosphere and the average heat flows for both lithosphere types.
Figures adapted from Frank Press and Raymond Siever, Earth. ©1986 by W. H. Freeman and Co.
Figure 3 shows the average relationship between temperature and depth for both lithosphere types. The shaded areas are where lithosphere material would melt with and without water.
28. Some of the highest heat flows are found over hydrothermal vents on the seafloor, where steam and hot water rise out of Earth. According to Figure 2, hydrothermal vents are most likely found in:
Your Answer is
Correct Answer is F
Explanation
According to the hydrothermal vents mentioned in the question, there is steam and hot water rising, corresponding to the rising hot material in figure 2, that is, volcanic island arc or ocean ridge, so choose F