THE DYNAMIC EARTH: TAKE-HOME MESSAGES
L2.1 Earthquake seismology was key to understanding the fundamentals of Earth’s core.
L2.2 The core has profoundly affected the environment via the magnetic field it produces.
L2.3 The contents of original papers can be surprising.
L3.1 The core can be studied using seismology, petrology/geochemistry, and heat flow data.
L3.2 Three isotope systems have been studied as possible tracers from the core-mantle
boundary.
L3.3 When data are looked at closely, only rarely do they require the hypothesis they support.
L4.1 Seismic tomography does not show the geological structure of the mantle because the
interpretation of seismic wavespeed is ambiguous.
L4.2 Mineralogical phase changes can either encourage convection or discourage it,
depending on the Clapeyron slope.
L4.3 Current seismological techniques may be inherently unable to detect plumes in the
lower mantle.
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