Thursday, May 19, 2022
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Geology Page

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Partial skull of Maehary bonapartei (CAPPA/UFSM 0300), left side, highlighting the maxilla. Photo: Rodrigo Temp Müller.
Fossils

A new 225-million-year-old reptile from Brazil

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One of the strombolian explosions that have occurred at Stromboli about every 10 minutes for at least 2000 years. © UNIGE, Luca Caricchi
Earthquake

Volcanoes at fault if the Earth slips

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The fossil of Jurassic lizard Eichstaettisaurus. Credit: Jorge Herrera Flores
Fossils

Researchers discover overlooked Jurassic Park of lizards

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The large, woody fruits of the Manicaria saccifera palm that depend on large animals for their dispersal. (Picture: John Dransfield, Royal Botanic Gardens, Kew)
Paleontology

Dinosaur extinction changed plant evolution

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Creative destruction: a thinner ocean plate sides under a continental plate, melting and recycling the ocean crust into the Earth’s interior and birthing volcanoes in this illustration of subduction, a consequence of modern plate tectonics. A new study reports evidence of a transition in multiple locations around the world, 3.8-3.6 billion years ago, from stable “protocrust” to pressures and processes that look a lot like modern subduction, suggesting a time when plates first got moving. Credit: Nikolas Midttun, CC-BY
plate tectonics

Earliest geochemical evidence of plate tectonics found in 3.8-billion-year-old crystal

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Map shows location of the Shumagin Gap, location of the 2020 Simeonof and 2021 Chignik earthquakes. Map courtesy Alaska Earthquake Center.
Earthquake

Major 2020 Alaska quake triggered neighboring 2021 temblor

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Using satellite imagery (shown above) to study the effects of a 2019 landslide on the Amalia Glacier in Patagonia, a University of Minnesota-led research team found the landslide helped stabilize the glacier and caused it to grow by about 1,000 meters over the last three years. Photo credit: Max Van Wyk de Vries
Landslide

Landslides can have a major impact on glacier melt and movement

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Basalt mit frischen Klinopyroxenen (credit Jonas Tusch)
Earth

Sampling the deep graveyard of Earth’s earliest crust

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Vertebrate bones exposed during fieldwork in the Zhebao region of Guangxi ProvinceThe arrows indicate ribs, exposed in cross-section
Fossils

Large Mesozoic Marine Reptile Described

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Painting of the Mid-Ocean Ridge with rift axis by Heinrich Berann based on the scientific profiles of Marie Tharp and Bruce Heezen (1977).
plate tectonics

Seafloor spreading has been slowing down

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Lake El´gygytgyn. Credit: UMass Amherst
climate

Million-year-old Arctic sedimentary record sheds light on climate mystery

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Seismogram
Earthquake

A swarm of 85,000 earthquakes at the Antarctic Orca submarine volcano

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One of the strombolian explosions that have occurred at Stromboli about every 10 minutes for at least 2000 years. © UNIGE, Luca Caricchi
Volcanoes

The oxidation of volcanoes—a magma opus

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An imagined scene from the end of the Cretaceous Period, more than 66 million years ago, has the newly identified softshell turtle Hutchemys walkerorum dwelling alongside iconic species from the Age of the Dinosaurs. (Image: Sergey Krasovskiy)
Dinosaur

Newly identified softshell turtle lived alongside T. rex and Triceratops

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Zircon Crystals of the mineral zircon are tiny time-capsules that record the age of many events in Earth’s history. Dating zircon crystals like this was one of the two methods used to calculate the age of the Hiawatha impact crater. Illustration: Gavin Kenny, Swedish Museum of Natural History.
Crater

Giant impact crater in Greenland occurred a few million years after...

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The unstable southern flank of the Merapi volcano during a partial collapse in 2019. Photograph: GFZ Potsdam
Volcanoes

Hidden weaknesses within volcanoes may cause volcano collapse

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California’s San Andreas Fault. The “creeping” central section, subject of a new study, is in yellow. Rock samples from almost 2 miles down were taken at the San Andreas Fault Observatory at Depth, or SAFOD, marked by the red star. (Adapted from Coffey et al., Geology, 2022)
Fault

A slow-motion section of the San Andreas fault may not be...

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grains of sand
Earth

New technique unlocks ancient history of Earth from grains of sand

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Kimberlites are complex rocks that came to the Earth's surface from great depths. The picture shows a thin section of a carbonate-​rich kimberlite. (Photograph: David Swart / Messengers of the Mantle Exhibition)
Earth

Traces of life in the Earth’s deep mantle

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Earthquake

Earthquake fracture energy relates to how a quake stops

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