A new study has revealed that two continent-sized regions in Earth's deep mantle have distinctive histories and resulting chemical composition, in contrast to the common assumption that they are the same. The findings are ...
Earth Sciences
Feb 28, 2025
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81
If you've ever looked at Mars through a telescope, you probably noticed its two polar ice caps. The northern one is made largely of water ice—the most obvious sign that Mars was once a wetter, warmer world. A team of researchers ...
Planetary Sciences
Feb 28, 2025
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80
A team of geologists and mineral physicists at Harvard University, the University of California, Argonne National Laboratory and the University of Chicago has found evidence via lab experiments that show the Earth's mantle ...
The magnitude 7.9 Bonin Islands earthquake sequence in May 2015, which ruptured deep within the earth near the base of the upper mantle, did not include an aftershock that extended to record depths into the lower mantle, ...
Earth Sciences
Jan 22, 2025
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80
Deeply hidden in Earth's mantle there are two huge "islands" the size of a continent. New research from Utrecht University shows that these regions are not only hotter than the surrounding graveyard of cold sunken tectonic ...
Earth Sciences
Jan 22, 2025
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83
The processes that form continental crust from the denser basaltic rocks of the upper mantle may make the lower lithosphere denser than the underlying mantle. One theory holds that the lower lithosphere splits away and sinks ...
Earth Sciences
Jan 20, 2025
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220
A research team from the University of Göttingen and the Max Planck Institute for Solar System Research (MPS) has discovered another piece in the puzzle of the formation of the moon and water on Earth. The prevailing theory ...
Planetary Sciences
Jan 16, 2025
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120
Geophysicists at ETH Zurich are using models of the lower mantle to identify areas where earthquake waves behave differently than previously assumed. This indicates the presence of zones of rocks that are colder, or have ...
Earth Sciences
Jan 7, 2025
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101
Earth's continents are slowly moving across the planet's surface due to plate tectonics, culminating in regions of crustal expansion and collision. In the latter case, high temperatures and pressures lead to the reworking ...
Caltech researchers have developed a new method to study Earth's structure deep beneath the surface, at the boundary between Earth's brittle crust and the underlying mantle, a region called the Mohorovičić discontinuity—Moho ...
Earth Sciences
Nov 27, 2024
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137