Saturday, September 19, 2020
plate tectonics

plate tectonics

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Graduate student Mike Duvall is pictured here in southeastern Nepal during fieldwork in 2017. Image credit: John Waldron
plate tectonics

Scientists discover fault system in southeastern Nepal

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San Andreas Fault Zone
plate tectonics

Chance of big San Andreas earthquake increased by Ridgecrest temblors, study...

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A snapshot of a model from the new work, showing the late stages of growth and coalescence of a new global fracture network. Fractures are in black / shadow, and colors show stresses (pink color denotes tensile stress, blue color denotes compressive stress).
plate tectonics

A new idea on how Earth’s outer shell first broke into...

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The Andes seen from space. The height of the Andes, like the height of other mountain ranges on Earth, is determined by tectonic forces (Credit: NASA; Astronaut photograph ISS059-E-517).
plate tectonics

Which factors control the height of mountains?

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New Curtin University research on the remixing of Earth's stratified deep interior suggests that global plate tectonic processes, which played a pivotal role in the existence of life on Earth, started to operate at least 3.2 billion years ago. Credit: Professor Zheng-Xiang Li
plate tectonics

Remixed mantle suggests early start of plate tectonics

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Proposed model for deep-carbon transport along a cratonic boundary in the EARS study region.
plate tectonics

Scientists decipher the role of carbon and the break-up of continents

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This artist’s impression shows a view of the surface of the planet Proxima b orbiting the red dwarf star Proxima Centauri, the closest star to the Solar System. The double star Alpha Centauri AB also appears in the image to the upper-right of Proxima itself. Proxima b is a little more massive than the Earth and orbits in the habitable zone around Proxima Centauri, where the temperature is suitable for liquid water to exist on its surface. (Illustration by ESO/M. Kornmesser)
plate tectonics

Study finds a (much) earlier birth date for tectonic plates

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Subduction zones occur where one tectonic plate dives under another. New computer modeling by Magali Billen, professor of earth and planetary sciences at UC Davis, shows why earthquakes on these sinking plates cluster at certain depths and could give insight into processes deep in the Earth. (U.S. Geological Survey)
plate tectonics

New clues to deep earthquake mystery

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Researchers developed a technique that allows them to study the atomic arrangements of liquid silicates at the extreme conditions found in the core-mantle boundary. This could lead to a better understanding of the Earth's early molten days, which could even extend to other rocky planets. Credit: Greg Stewart/SLAC National Accelerator Laboratory
plate tectonics

Earth’s evolutionary tale, researchers probe materials at deep-Earth conditions

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Francis Macdonald walks along a road near Manitou Springs, Colorado, where an exposed outcrop shows a feature known as the "Great Unconformity."
plate tectonics

The Great Unconformity : A billion years is missing from the...

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An artistic cross-section through forming crust approximately 3-4 billion years ago. The presence or absence of plate tectonics during this time is a topic of vigorous scientific debate. A study led by Harvard geologists has found evidence that the crust moved quickly over Earth's surface in the deep past, a hallmark of modern plate tectonics. This suggests that plate motion could have been a meaningful process in early Earth history. Credit: Alec Brenner, Harvard University
plate tectonics

Tectonic plates started shifting earlier than previously thought

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Geologists studying rock samples from Baffin Island find lost fragment of continent. Credit: istock
plate tectonics

Geologists find lost fragment of ancient continent in Canada’s North

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The rocks the team analysed are the oldest preserved mantle rocks. They allow us to see into the early history of the Earth as if through a window. Credit: UNSW
plate tectonics

Building blocks for life on Earth arrived much later than we...

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Benjamin Johnson of Iowa State University woks at an outcrop in remote Western Australia where geologists are studying 3.2-billion-year-old ocean crust. Photo by Jana Meixnerova. Photos provided by Benjamin Johnson.
plate tectonics

Geologists determine early Earth was a ‘water world’ by studying exposed...

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Isobath map of the eastern Alborán basin with the volcanic edifice location. Orange lines show the main flood paths. (Image: García-Castellanos et al, 2020, Earth-Sciences Reviews)
plate tectonics

New pieces of evidence found in the Alborán Sea possibly related...

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Calculated lattice thermal conductivity of MgSiO3 postperovskite (PPv) and bridgmanite (Brg) under the Earth’s lowermost mantle conditions. Credit: Ehime University
plate tectonics

Heat transport property at the lowermost part of the Earth’s mantle

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Horseshoe Bend, Arizona
plate tectonics

As groundwater depletes, arid American West is moving east

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Credit: University of St Andrews
plate tectonics

Hidden past of Earth’s oldest continents unearthed

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Satellite image of the Gibraltar Arc. Credit: NASA
plate tectonics

Lithospheric thickening beneath the Betics and Rif mountains pulls down the...

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Earth's layers
plate tectonics

New insights into the formation of Earth’s crust

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