Gifts from the Core

TNRTB Archive – Retained for reference information

Geophysicists have discovered more evidence for the amazing design of Earth’s interior for the benefit of human civilization. They found additional evidence that Hawaiian lava flows contain an iron excess that must have come from the liquid outer core of the earth. (The earth is divided into four main layers: the inner core, outer core, mantle, and crust.) Apparently, Earth’s interior is so exquisitely designed that limited chemical exchange occurs at the liquid core/deep mantle boundary. Then, deep mantle plumes cause material at the boundary to upwell to crustal hot spots where volcanoes spew out a broad flow of iron-rich lava upon Earth’s surface. In places like Hawaii such lava flows quickly cool and decompose to form some of the richest farmlands on the planet.

• Munir Humayun, Liping Qin, and Marc D. Norman, “Geochemical Evidence for Excess Iron in the Mantle Beneath Hawaii,” Science 306 (2004): 91-94.
• https://www.sciencemag.org/
• Cin-Ty Aeolus Lee, “Are Earth’s Core and Mantle on Speaking Terms?” Science 306 (2004): 64-65.
• https://www.sciencemag.org/
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