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Unformatted text preview: rms at rifts, especially on the sea
floor, where the lithosphere moves apart; mantle
OCE 661 f. 1963: Geologists (Frederick Vine) discover the
phenomenon of periodic magnetic reversals in the earth's
crust, evident from the pattern of
alternating magnetic polarity in the ocean floor near midocean rifts. This discovery supports Hess' idea of sea-floor
g. 1965: Scientist now suspect the existence of "hot spots",
junctures at tectonic plates through which heat leaks up
into the ocean; hot spots are not detected until the 70s.
h. 1977: Scientists using the submersible ALVIN discover
deep ocean vents near the Galapogos Islands, where hot,
mineral-laden water spews into
i. DSDP (Deep Sea Drilling Project) began in 1963, funded
by NSF, Joint Oceanographic Institutes for Deep Earth
Sampling (JOIDES ) now headed by TAMU. OCE 661 Meanwhile, back closer to the surface, Holmes provided a
possible mechanism for driving the plates, convection. Simple thermal convection like this is based on:
1) Equal input from below and loss from th...
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- Winter '14