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An international group of researchers—from Texas, China and Japan—sought to understand how the massive Tamu Massif volcano formed near the nexus of three spreading ridges. The discovery of Tamu Massif, a gigantic volcano located about 1,000 miles east of Japan, made big news in 2013 when researchers reported it was the largest single volcano documented on earth, roughly the size of New Mexico. Sager and his team’s findings appear in the September 8 issue of Nature Geoscience, the monthly multi-disciplinary journal reflecting disciplines within the geosciences. “This is really a large volcanic system, not a single volcano.”, Researchers now think Tamu Massif formed as part of that mid-ocean ridge system, he said. "This is really a large volcanic system, not a single volcano. The key, they report, is magnetic anomalies. With the discovery, Sager said Tamu Massif can no longer be considered the world's largest shield volcano. New Findings Suggest a Re-Thinking of Massive Underwater Volcano. “In science, we always have to question what we think we know and to check and double check our assumptions. This is supported by other big volcanoes on Mars, for example Olympus Mons which should have been created by such other cometary impact there.
The resulting map shows that linear magnetic anomalies around Tamu Massif blend into linear anomalies over the mountain itself—implying that the underwater volcano formed by extraordinary mid-ocean ridge crustal formation.
This eruption is thought to be analogous to massive eruptions on land, called "continental flood basalts" and it creates a vertical succession of lava flows. Tamu Massif covers an area of about 120,000 square miles. Click here to sign in with
All Rights Reserved. The top of Tamu … New findings, reported this week in Nature Geoscience, conclude that it is a different breed of volcanic mountain than earlier thought, throwing into doubt the prior claim that it is the world’s largest single volcano. The tectonic plates have moved quite far for the hotspot that caused that one. By University of Houston The resulting map shows that linear magnetic anomalies around Tamu Massif blend into linear anomalies over the mountain itself – implying that the underwater volcano formed by extraordinary mid-ocean ridge crustal formation. The discovery of Tamu Massif, a gigantic volcano located about 1,000 miles east of Japan, made big news in 2013 when researchers reported it was the largest single volcano documented on earth, roughly the size of New Mexico.
Medical Xpress covers all medical research advances and health news, Tech Xplore covers the latest engineering, electronics and technology advances, Science X Network offers the most comprehensive sci-tech news coverage on the web. “An immense amount of magma came from the center, and this magma had to have come from the Earth’s mantle. "Tamu Massif is certainly one of the largest volcanic mountains in the world.". Credit: Will Sager.
These ridges record distinctive linear magnetic anomalies, parallel to the ridge, as they form new crust. The resulting map shows that linear magnetic anomalies around Tamu Massif blend into linear anomalies over the mountain itself – implying that the underwater volcano formed by extraordinary mid-ocean ridge crustal formation.
©2020 University of Houston. A paper published in 2013 by Sager and colleagues concluded that Tamu Massif is an enormous shield volcano, formed by far-reaching lava flows emanating from its summit. "Science is a process and is always changing. William Sager, a geophysicist at the University of Houston and senior author for the paper, said the discovery led researchers to conclude that Tamu Massif formed by mid-ocean ridge “spreading,” the geologists’ term for creation of ocean crust at mid-ocean ridge plate boundaries, rather than as a shield volcano, as previously thought. Its top lies about 6,500 feet below the ocean surface, while much of its base is believed to be in waters that are almost four miles deep. The key, they report, is magnetic anomalies. To find a worthy comparison, one must look skyward to the planet Mars, home to Olympus Mons.
Tamu Massif stands out among underwater volcanoes not just for its size, but also its shape. Tamu Massif made news in 2013, thought to be the world's largest volcano. It became inactive within a few million years after it was formed. So this is important information for geologists trying to understand how the Earth’s interior works.”. William Sager, a geophysicist at the University of Houston and senior author for the paper, said the discovery led researchers to conclude that Tamu Massif formed by mid-ocean ridge “spreading,” the geologists’ term for creation of ocean crust at mid-ocean ridge plate boundaries, rather than as a shield volcano, as previously thought.
“Science is a process and is always changing.
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