Ancient Explosive Volcanoes on Mars

Featured image: a mushroom shaped volcanic plume arising from the explosive activity of Redoubt volcano, Alaska in 1990. Credit: R. Clucas.

Paper: Caldera Collapse and Volcanic Resurfacing in Arabia Terra Provide Hints of Vast Under-Recognized Early Martian Volcanism

Authors: Yin Yau Yoyo Chu, Joseph R. Michalski, Shawn P. Wright, A. Alexander G. Webb.

Mars is a planet of extreme highs and lows containing the solar system’s largest volcano – Olympus Mons – and the largest canyon system – Valles Marineris. Tharsis and Elysium, the planet’s two largest volcanic provinces, are young surface features that were built by basaltic volcanism throughout the Amazonian, the most recent geological era on Mars.

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What Lies Beneath: Tracing Magma Interactions Within Earth’s Crust

Featured Image: Yosemite National Park, California, USA by Thomas H. from Pixabay 

Paper: Feldspar recycling across magma mush bodies during the voluminous Half Dome and Cathedral Peak stages of the Tuolumne intrusive complex, Yosemite National Park, California, USA

Authors: Louis F. Oppenheim, Valbone Memeti, Calvin G. Barnes, Melissa Chambers, Joachim Krause, and Rosario Esposito

Earth’s landscapes provide evidence of the geological processes which have shaped it over the past 4 billion years.  The Earth’s crust, our planet’s outermost layer, preserves an extensive record of these processes. Within the crust igneous rocks which were once molten at depth and fed active volcanic eruptions, preserve evidence of the inner workings of volcanoes. These inner workings or “magmatic plumbing systems” are the focus of recent work by Oppenheim et al. (2021). In this work, Oppenheim and co-authors studied the crystal record of fossilized plumbing systems in order to provide new insights into the storage conditions and transport mechanisms of magma within Earths’ crust.

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When Lightning Strikes! Fulgurite Formation and Earth’s Weather

Paper: Lightning-induced weathering of Cascadian volcanic peaks


Authors: Jonathan M. Castro, Franziska Keller, Yves Feisel, Pierre Lanari, Christoph Helo, Sebastian P. Mueller, C. Ian Schipper, Chad Thomas

The bright flashes followed by the loud thunderclaps of large storms are inherently transient, but a recent study by Castro et al proposes a new approach to investigating the history of storm activity and extreme weather events on Earth: through fossilized lightning strikes, or fulgurites.

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