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Uplift, thermal unrest and magma intrusion at Yellowstone caldera

Nature

By:
, , ,
DOI: 10.1038/nature04507

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Abstract

The Yellowstone caldera, in the western United States, formed ???640,000 years ago when an explosive eruption ejected ???1,000 km3 of material. It is the youngest of a series of large calderas that formed during sequential cataclysmic eruptions that began ???16 million years ago in eastern Oregon and northern Nevada. The Yellowstone caldera was largely buried by rhyolite lava flows during eruptions that occurred from ???150,000 to ???70,000 years ago. Since the last eruption, Yellowstone has remained restless, with high seismicity, continuing uplift/subsidence episodes with movements of ???70 cm historically to several metres since the Pleistocene epoch, and intense hydrothermal activity. Here we present observations of a new mode of surface deformation in Yellowstone, based on radar interferometry observations from the European Space Agency ERS-2 satellite. We infer that the observed pattern of uplift and subsidence results from variations in the movement of molten basalt into and out of the Yellowstone volcanic system. ?? 2006 Nature Publishing Group.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Uplift, thermal unrest and magma intrusion at Yellowstone caldera
Series title:
Nature
DOI:
10.1038/nature04507
Volume
440
Issue:
7080
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Nature
First page:
72
Last page:
75
Number of Pages:
4