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“#Asteroid impact, not volcanoes, made the Earth uninhabitable for dinosaurs” An individual of Ankylosaurus magniventris, a large armoured dinosaur species, witnesses the impact of an asteroid, falling on the Yucatán peninsula 66 million years ago. Not even its large size and thick armour sheltered its kind from the violence of this cosmic disaster. Credit: Fabio…
“#Computing collaboration reveals global ripple effect of shifting monsoons” Members of the international team simulated changes to the start times of monsoon seasons across the globe, with warm colors representing onset delays. Credit: Moetasim Ashfaq and Adam Malin/Oak Ridge National Laboratory, U.S. Dept. of Energy Scientists from the Department of Energy’s Oak Ridge National Laboratory…
“#How volcanoes explode in the deep sea” Credit: CC0 Public Domain Most volcanic eruptions take place unseen at the bottom of the world’s oceans. In recent years, oceanography has shown that this submarine volcanism not only deposits lava but also ejects large amounts of volcanic ash. “So even under layers of water kilometers thick, which…
“#The magnetic history of ice” Next to Prof. Oded Aharonson is the tri-axial Helmholtz Coil used to generate the magnetic field during the growing of the ice samples. Credit: Weizmann Institute of Science The history of our planet has been written, among other things, in the periodic reversal of its magnetic poles. Scientists at the…
“#3-D magnetotelluric imaging reveals magma recharging beneath Weishan volcano” Cartoon interpretation of magma reservoirs beneath Weishan volcano. Credit: Gao Ji et al A collaborative research team from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) and China Geological Survey (CGS) have succeeded in obtaining a high-resolution 3-D…
“#Geochemists solve mystery of Earth’s vanishing crust” Scientists examined hundreds of samples taken along the global ridges that contain recycled ancient oceanic crust in variable amounts. “Depleted” segments of the ridge received lower than “normal” amounts of recycled crust, while “enriched” segments contain a larger proportion of recycled crust. Credit: Caroline McNiel/National MagLab Thank goodness…
“#The geological record of mud deposits” María Jesús Irabien. Photo: UPV/EHU The nature of the sediments on the Basque continental shelf is very heterogeneous. From the point of view of distribution, two clearly differentiated sectors can be picked out in terms of grain size. “In the area of Bizkaia medium to coarse-sized sands predominate, whereas…
“#Both the famous Hope diamond and British Crown Jewel diamonds, may be “super-deep”” An analysis of the first large diamonds confirmed to come from deep under the Earth’s surface supports initial predictions showing that the Smithsonian’s famous Hope diamond may be “super deep”, originating from more than three times deeper in the Earth than most…
“#Simulations reveal how saltwater behaves in Earth’s mantle” An artist’s depiction of highly compressed saltwater at high temperature. Credit: Zhang et al Scientists estimate that the Earth’s mantle holds as much water as all the oceans on the planet, but understanding how this water behaves is difficult. Water in the mantle exists under high pressure…
“#New research reveals how water in the deep Earth triggers earthquakes and tsunamis” Quill, on the island of Statia. One of the islands in the Lesser Antilles. Credit: Dr George Cooper In a new study, published in the journal Nature, an international team of scientists provide the first conclusive evidence directly linking deep Earth’s water…