Exploring beneath the ocean floor.

The JR is a seagoing research vessel that drills core samples and collects measurements from under the ocean floor, giving scientists a glimpse into Earth’s development.

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Now At Sea

August 04, 2014 - September 29, 2014

What happens at the edges of large oceanic plates when subduction begins?

This will not only give insight into how subduction zones form, but also how the magma generated from this process eventually becomes the crust of an island arc and then a continent.

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Quiet Shifts, Crazy Crossovers…

This past week we completed drilling and geophysical logging of the hole at Site 1440B, and then we used the ship’s thruster system to slowly motor back the ~8 km to Site 1439, where at midnight we deployed a re-entry cone to set up for hard-rock drilling near Site A – first they quick-drill through the sediments, then they case the hole for stability before deploying their hard-rock RCB drill bit

Logging without an axe

Though structural geologists use our smaller sample of cored rock to form the larger picture of what its surrounding rock may look like, confirmation about the hole’s physical and chemical traits comes from the work of our logging staff scientist, Sally Morgan.