A record-breaking drilling attempt, which dug more than a kilometer into an underwater mountain in the Atlantic Ocean, has given scientists a treasure trove of rocks to study for clues to Earth's inner workings.
For the first time, scientists have drilled into an underwater mountain to collect a record-breaking chunk of Earth's mantle — a core of rock that's more than 3,280 feet long.
Despite the groundbreaking findings, this isn't the deepest a drill has ever gone into the seabed, and technically, it didn't dig into Earth's mantle. Instead, the researchers took advantage of a"tectonic window" — a region where mantle rocks have been pushed above their usual resting place — to sink the drill and extract the material. "On Earth, mantle rock is normally extremely difficult to access," the geologists wrote in a blog post.
This has meant that to study chunks of Earth's mantle for clues into diverse processes such as volcanism and the planet's magnetic field, scientists have had to rely on rock chunks spat out from volcanic eruptions, all of which have been altered by their journey to the surface.
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