Geology news

Geophysicists challenge theory of the origin of mid-plate volcanoes

Source of volcanoes may be much closer than scientists thought


 IMAGE: Traditional thought holds that hot updrafts from the Earth's core cause volcanoes, but researchers say eruptions may stem from the asthenosphere, a layer closer to the surface.

A long-held assumption about the Earth is discussed in today's edition of Science, as Don L. Anderson, an emeritus professor with the Seismological Laboratory of the California Institute of Technology, and Scott King, a professor of geophysics in the College of Science at Virginia Tech, look at how a layer beneath the Earth's crust may be responsible for volcanic eruptions.

Desert arches

Geologists now have explained how these remarkable desert sandstone arch structures form. It was thought to be mostly wind but as it turns out it is the nature of rock itself that allows these to form. 

According to the report in

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