The Briefing Room
General Category => Science, Technology and Knowledge => History => Topic started by: rangerrebew on June 13, 2017, 11:07:14 am
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The mysterious bend in the Hawaiian-Emperor chain
Date:
June 8, 2017
Source:
GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre
Summary:
The volcanic islands of Hawaii represent the youngest end of a 80 million years old and roughly 6,000 kilometers long mountain chain on the ground of the Pacific Ocean. The so-called Hawaiian-Emperor chain consisting of dozens of volcanoes is well known for its peculiar 60 degrees bend. The cause for this bend has been heavily debated for decades. Scientists now offer an explanation in a new study.
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FULL STORY
https://www.sciencedaily.com/releases/2017/06/170608123615.htm
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(https://www.sciencedaily.com/images/2017/06/170608123615_1_540x360.jpg)
One explanation is an abrupt change in the motion of the Pacific tectonic plate, the opposite model states southward drift of the mantle plume that has sourced the chain since its beginning 80 million years ago. Apparently both processes play an important role, shows a new study in Nature Communications, published by a group of scientists from the University of Oslo, German Research Centre for Geosciences GFZ Potsdam, and Utrecht University.