Cook Islands seamounts and volcanoes
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July 20, 2024
Prevailing scientific wisdom tells us that volcanic seamounts and oceanic islands are forged from magma
Category: Volcanism
Seamounts, hotspots, and atolls
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July 1, 2024
Seamounts and volcanic islands – the foundations for atolls and fringing reefs. A historical interlude
Airfall pyroclastics drape antecedent topography
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May 25, 2024
Every geological outcrop tells a story. How often do you pass a road-side rock outcrop
Pyroclastic surges and base surges
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April 1, 2022
Pyroclastic surges, are dilute, ground-hugging turbulent flows of hot, juvenile volcanic particles and a fluid
Accretionary aggregates and accretionary lapilli
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March 18, 2022
I have been under the (mistaken) impression that accretionary aggregates, including accretionary lapilli, are occasional
Block and ash flows
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March 9, 2022
Block and ash flows – a hot pyroclastic flows that transport big chunks of rock
Ignimbrites in outcrop and thin section
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February 21, 2022
Ignimbrite is a rock name. Ignimbrites form primarily from the collapse of eruption columns during
Volcanics in outcrop: Pyroclastic density currents
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December 3, 2021
This post continues the series on volcanic and volcaniclastic rocks in outcrop, with a brief
Volcanics in outcrop: Pyroclastic fall deposits
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June 21, 2020
A look at volcaniclastics – pyroclastic fall deposits in outcrop This is part of the
Mount St. Helens: 40th anniversary
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May 15, 2020
May 18, 1980, a crisp, clear Cascade mountains morning was rent by the catastrophic
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