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JP student Clare M. Williams examines a rock sample.

JP student Clare M. Williams examines a rock sample.
JP student Clare M. Williams examines a rock sample.
JP student Clare M. Williams examines a rock sample.
JP student Clare M. Williams examines a rock sample.
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59561
Kleindinst, Thomas N.
JP student Clare M. Williams examines a rock sample.
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10/17/2006
graphics/Clare_Williams/_DSC6943.jpg
Image of the Day caption:
Clare M. Williams, a graduate student in the MIT/WHOI Joint Program, examines a rock collected from the seafloor to analyze its magnetic properties. Magnetism lets her unravel the patterns of lava flows to learn how ocean crust builds up over time. We know that lava flows come out onto the seafloor periodically, at different spots, to build up crust, said Williams. You can tell an old flow [which has a lower-intensity magnetic signal] from a new flow.
Photo by Tom Kleindinst
© Woods Hole Oceanographic Institution
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