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 for the […]

Fountain Paint Pot. Credit: National Park Service. Throughout Earth’s long history, volcanic super-eruptions have been some of the most extreme events ever to affect our planet’s rugged surface. Surprisingly, even though these explosions eject enormous volumes of material— at least 1,000 times more than the 1980 eruption of Mount St. […]

Illustration of the natural fluid injection process that triggered the Cahuilla swarm. Credit: CalTech Natural Fluid Injections Triggered Cahuilla Earthquake Swarm Machine-learning algorithm helps geoscientists create a 3-D picture of a fault zone, generating new insight into seismic processes. A naturally occurring injection of underground fluids drove a four-year-long earthquake […]

A lump of coal weathering out from Siberian flood basalts in a quarry near the town of Ust Ilimsk. Credit: Scott Simper A team of researchers led by Arizona State University School of Earth and Space Exploration Professor Lindy Elkins-Tanton has provided the first ever direct evidence that extensive coal burning in […]

These giant mounds of fossil stromatolites from about 2.5 billion years ago are located in South Africa. For scale, notice a person’s dangling legs at the top center. These layered minerals were deposited on an ancient coastline by communities of microbes, including photosynthetic bacteria that generated oxygen. The new study […]

A hiker walks along a road near Manitou Springs, Colorado, where an exposed outcrop shows a feature known as the “Great Unconformity.” Credit: Rebecca Flowers A team of geologists led by CU Boulder is digging into what may be Earth’s most famous case of geologic amnesia. Researchers have spotted that phenomenon, […]

The crystal structure of the feldspar anorthite under normal conditions (left) and the newly discovered high-pressure variant (right). Under normal conditions, the silicon and aluminum atoms form tetrahedra (yellow and blue) with four oxygen atoms each (red). Under high pressure polyhedra with five and six oxygen atoms are formed. Calcium […]

Credit: CC0 Public Domain The National Science Foundation should invest in new initiatives, partnerships and infrastructure to answer 12 priority research questions relevant to society in the next decade, according to a new report from the National Academies of Sciences, Engineering, and Medicine. A Vision for NSF Earth Sciences 2020-2030: Earth […]