Thursday, May 28, 2020
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Geology Page

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UT Austin scientists found that the fossil millipede Kampecaris obanensis was 425 million years old. Credit: British Geological Survey
Fossils

World’s oldest bug is fossil millipede from Scotland

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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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URI graduate student Reilly Hayes (left) and undergraduate Amanda Bednarick examine an outcrop for fossils at Petrified Forest National Park as part of their research. Credit: Amanda Bednarick
Asteroid

Asteroid, climate change not responsible for mass extinction 215 million years...

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Credit: Pohang University of Science & Technology (POSTECH)
Volcanoes

Volcanic eruptions reduce global rainfall

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The attached image shows Wightia declivirostris flying over an oxbow lake in the valley of the ancient Wessex River that flowed from Devon to the Isle of Wight. Credit: Megan Jacobs
Dinosaur

Chinese pterodactyl wings its way to the United Kingdom

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A schematic diagram of the Earth's deep oxygen factory shows the oxygenation and deoxygenation processes of hydrous mantle materials in the lower mantle across the ~1000 km depth beneath Earth's surface. Under the conditions of Earth's middle mantle, scientists discovered an oxygen-excess phase, (Mg,Fe)2O3+δ (0 < δ < 1) that can be formed with under-saturated water at >1000 kilometers depths. Those oxygen-excess materials may have long-termly oxidized the shallow mantle and the crust, which is essential to allow free oxygen to build up in Earth's atmosphere. Credit: Science China Press
Earth

Oxygen-excess oxides in Earth’s mid-mantle facilitate the ascent of deep oxygen

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Normal and malformed spores from East Greenland. Credit: John Marshall
Paleontology

Erosion of ozone layer responsible for mass extinction event

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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)
Continents

New clues to deep earthquake mystery

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Big theropod dinosaurs such as Allosaurus and Ceratosaurus ate pretty much everything -- including each other, according to a new study. Credit: PLOS ONE
Dinosaur

In stressed ecosystems Jurassic dinosaurs turned to scavenging, maybe even cannibalism

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Earth
Earth

Earth’s lower mantle can be oxidized in the presence of water

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Original artwork depicting the moment the asteroid struck in present-day Mexico. Credit: Chase Stone
Dinosaur

Dinosaur-dooming asteroid struck earth at ‘deadliest possible’ angle

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The rising Earth from the perspective of the moon.
Earth

Project aims to create first 4-D maps of Earth’s mantle

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Earth's mantle (dark red) lies below the crust (brown layer near the surface) and above the outer core (bright red).
Earth

The 12 questions earth scientists should ask in the next 10...

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Picture of the Santa Maria volcano in Guatemala. Credit: Zorn et al. 2020, Nature
Volcanoes

How drones can monitor explosive volcanoes

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An artistic life reconstruction of Nannopterygius. Credit: Andrey Atuchin
Fossils

Fishing rod ‘selfie stick’ and scientific sleuthing turn up clues to...

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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
Continents

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

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An artist’s impression of what an elaphrosaur may have looked like. Credit: Ruairidh Duncan
Dinosaur

Elaphrosaur : Australia’s first elaphrosaur discovered in Victoria

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Robert Reisz examined fossils from the embryos of Lufengosaurus, an early sauropodomorph species that predates more recognizable sauropods. Credit: David Mazierski
Dinosaur

New research examining dinosaur tooth fossils provides crucial insight into vertebrate...

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In this artist's depiction of wildlife from Alberta, Canada, 77 million years ago, the tyrannosaur Daspletosaurus hunts a young horned Spinops, while an adult Spinops tries to interfere and a Coronosaurus watches from a distance. Credit: Julius Csotonyi.
Dinosaur

T. rex’s long legs were made for marathon walking

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The only remnants of Pūhāhonu that are above sea level (Gardner Pinnacles). Credit: NOAA
Volcanoes

Researchers reveal largest and hottest shield volcano on Earth

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