Laura is a science news writer, covering a wide variety of subjects, but she is particularly fascinated by all things aquatic, paleontology, nanotechnology, and exploring how science influences daily life. Laura is a proud former resident of the New Jersey shore, a competitive swimmer, and a fierce defender of the Oxford comma.
ArticleBody:For the first time, an international team of scientists recovered a long section of rocks that originated in the Earth’s mantle. This layer just below the crust is the largest part of the planet’s interior, so understanding it can tell us a great deal about some of Earth’s more explosive characteristics. This nearly continuous 4,160 feet of mantle rock is described in a study published August 8 in the journal Science.
Thomas Ronge The team was led by the International Ocean Discovery Program. This international marine research consortium over 20 countries retrieves sediment cores. These cylindrical samples of rock, sand, and other sediment from the ocean floor are like a timeline of our planet’s history. Since the core was drilled, the expedition team has been compiling an inventory of the mantle rocks to better understand their composition, structure, and context.
: Lesley Anderson, Exp. 399, JRSO_IODP According to Lissenberg, the results were quite different than they expected. There was less of the mineral pyroxene and higher concentrations of magnesium in the rock. Both of these results from a higher amount of melting than the team would have predicted. This melting occurred as the mantle rose up from the deeper parts of the Earth towards the surface.
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