Upper Mantle

A long-lost slab of Earth's crust may be pulling away the bottom of the oldest part of North America, scientists say

The South Pole-Aitken basin is the moon's largest crater. Scientists have thought it was oval-shaped, but a new study suggests it's more circular. The post Moon's largest crater is rounder than 1st thought first appeared on EarthSky.

What's the difference between 'climate' and 'weather'? Although they are related, these are actually two distinct concepts and they are measured at very different timescales. Despite this, some people use these terms interchangeably, leading to

Lava that erupts from hotspots around the world seems to come from a similar ancestral magma, new research finds.

Researchers suggest that the famed Golconda diamonds, including the Hope Diamond and Koh-i-noor, may have originated from a volcanic outcrop nearly 200 miles from where they were mined.

Every 8.5 years the Earth's core wobbles, resulting in a mysterious 'signal.' A new study attempts to explain this geophysical mystery.

Zealandia, Greater Adria, and Argoland had all but vanished until sleuthing geologists tracked them down. Some of these landmasses aren't lost, but simply hidden.

From a physical perspective, all of planet Earth is simply one enormous layer cake. Deep in our planet's interior, the densest material is found in our innermost core: a 400 mile (650 kilometer) wide…

Billions of years ago, in the giant disk of dust, gas, and rocky material that orbited our young sun, larger and larger bodies coalesced to eventually give rise to the planets, moons, and asteroids we see today.

That's huge for so many reasons.

Rocks fulfill 60-year-old quest and could yield science bonanza

Article URL: https://www.geoazur.fr/GLOBALSEIS/nolet/BDdiscussion.html Comments URL: https://news.ycombinator.com/item?id=34960226 Points: 1 # Comments: 0

Scientists have discovered a new layer of partly molten rock under the Earth's crust that might help settle a long-standing debate about how tectonic plates move. The molten layer is located about 100 miles from the surface and is part of the asthenosphere, which is important for plate tectonics because it forms a relatively soft boundary that lets tectonic plates move through the mantle. The researchers found,…

It might be the special circumstances of the Earth's formation that gave us the two types of crust that makes our planet unique in the Solar System.

Article URL: https://en.wikipedia.org/wiki/Lost_City_Hydrothermal_Field Comments URL: https://news.ycombinator.com/item?id=34268976 Points: 1 # Comments: 0

A research team led by Prof. Sun Weidong from the Institute of Oceanology of the Chinese Academy of Sciences (IOCAS) and their collaborators from Curtin University and Geological Survey of Western Australia have reported a remarkable mantle cooling event that records the onset of modern plate tectonics.

The Fagradalsfjall volcano in Iceland began erupting again on Wednesday after eight months of slumber – so far without any adverse impacts on people or air traffic. The eruption was expected. It's in a seismically active (uninhabited) area, and came after several days of earthquake activity close to...

Scientists identify a six-year cycle of super- and sub-rotation that affected the length of a day based on their analysis of seismic data. Earth's structure is divided into layers, with the inner core at the center followed by the outer core, lower mantle, upper mantle, crust, and atmosphere. The

Permanently shadowed regions may hold volatiles 'time capsule'.

Combinations of stable molybdenum (Mo) isotopes and radiogenic isotopes have great potential for researchers studying mantle heterogeneities, especially those with subduction-related processes.