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The modern Seattle fault zone cuts directly through the densely populated Puget lowlands, including Seattle and its metro area. Fifty million years ago, the continent tore in two here, setting the geologic stage for the modern faults, according to a new Tectonics study. Credit: Washington Geological Survey.

A new origin story for deadly Seattle fault

Three types of granitoid rocks—tonalite, trondhjemite and granodiorite (TTG).

Researchers uncover source rocks of the first real continents

Shears — or breaks caused by strain — in rock outcrops like the one pictured here could shed new light on tectonics that occur between major earthquakes in the subduction zone, according to new research. A camera lens shows the scale of the features of the rock. Credit: Provided by Donald Fisher . All Rights Reserved.

Ancient rocks improve understanding of tectonic activity between earthquakes

Ancient plate tectonics in the Archean period differs from modern plate tectonics in the Phanerozoic period because of the higher mantle temperatures inside the early Earth, the thicker basaltic crust, and the non-depletion of melt-mobile incompatible trace elements in the mantle. Credit: Science China Press

Plate tectonics in the Archean: Observation versus interpretation

Venus Photo by NASA/JPL

Venus had Earth-like plate tectonics billions of years ago, study suggests

For the microscopic examination, a thin section of the whiteschist was glued to a glass slide (center of the picture). Photo: Sebastian Cionoiu, Heidelberg University

Alpine rock reveals dynamics of plate movements in Earth’s interior

Ca-silicate inclusion inside a diamond from Kankan, Guinea. Photo credit: Margo Regier.

Superdeep diamonds provide a window on supercontinent growth

Plots of mineral modal abundance and the weight percentage of mineral-bound water (blue lines) for (a) metabasaltic and (b) metasedimentary rocks from the modern Cocos plate at 1.3 GPa and over the range of temperatures along the flat slab top beneath Guerrero.

Metasomatism and Slow Slip: Talc may make Mexico’s subduction zone more...

Credit: Science Advances (2023). DOI: 10.1126/sciadv.adh0150

New 3D images give never-seen-before views inside New Zealand’s largest fault

Mantle plumes, shown in red, have been identified around the world. (Ingo Wölbern, via Wikimedia Commons)

Scientists unearth 20 million years of ‘hot spot’ magmatism under Cocos...

A microscope image from an experiment conducted for this study. The image contains glass (brown), large garnets (pink) and other small mineral crystals. The field of view is 410 microns wide, about size of a sugar crystal. Credit: Science (2023). DOI: 10.1126/science.ade3418

Study presents new clues about the rise of Earth’s continents

New lab work suggests that rock roughness affects earthquake aftershock dynamics along faults. Credit: Dextersinister/Wikimedia Commons, CC BY-SA 4.0

Rougher faults may generate more earthquake aftershocks

Map of the tectonic plates (credit: Getty Images)

How did the Andes Mountains get so huge?

The concurrent subduction of the Pacific and Atlantic plates resulted in the formation of a mantle plum and the ascent of magma. (ill./©: Nicolas Riel)

Plate tectonic processes in the Pacific and Atlantic during the Cretaceous...

Model by Dr Tristan Salles, School of Geosciences.

Most detailed geological model reveals Earth’s past 100 million years

A diagram of the asthenosphere, which aids plate tectonics, where researchers at the UT Austin Jackson School of Geosciences say they detected a global layer of partial melt (shown in speckled red). Credit: Junlin Hua, UT Jackson School of Geosciences

Scientists detect molten rock layer hidden under Earth’s tectonic plates

The new study in Geophysical Research Letters shows a previously undiscovered change in tectonic plate thickness across the Denali Fault in Alaska impacts where it is located, shedding light on how major faults and earthquakes occur. Credit: Isabella Gama and Karen Fischer.

Researchers uncover secrets on how Alaska’s Denali Fault formed

A. The lithospheric breakup-collision coupling system, in which collisional thickening of the continental crust is coupled with lithospheric breakup due to asthenospheric upwelling for active rifting. B. The seafloor spreading-lithospheric subduction coupling system, in which the oceanic slab is subducted to depths of >80–100 km for the gravitational pull, providing far-field stresses for passive rifting. Credit: Science China Press

Plate tectonics in the twenty-first century

Superdeep diamonds that originate hundreds of kilometers beneath Earth’s surface are like time capsules revealing how they were formed, thanks to unique combinations of minerals trapped inside the diamonds. Credit: University of Alberta

‘Superdeep’ diamond deepens our understanding of plate tectonics

Microplastics of 2mm. Credit: NIOZ

Sunlight pulps the plastic soup

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