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MARCH-APRIL 2019 | VOLUME 29, NUMBER 3–4
SCIENCE
4 Holes in the Bottom of the Sea:
History, Revolutions, and Future Opportunities
Suzanne OConnell
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April is a combined issue). GSA TODAY is published by The to right): the Chikyu, a riser-equipped platform coring in the western
Geological Society of America Inc. (GSA) with offices at Pacific; the JOIDES Resolution, which recovers cores throughout the
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religion, or political viewpoint. Opinions presented in this (50 mi) off of the Shimokita Peninsula, Japan. Center: Paleocene–Eocene Thermal Maximum cores
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© 2019 The Geological Society of America Inc. All rights 2387-meter-deep water (mbsl). Right core is from Site 1262, Walvis Ridge, South Atlantic, taken at
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wholly by U.S. government employees within the scope of 4755 mbsl. Color change shows carbonate dissolution. Right: MSP Expedition 364, Site M0077, cored
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