John Maclennan
@johnmaclennan.bsky.social
Igneous Petrologist at Cambridge
Skye-AVCEI - field teaching in 18degC and a gentle westerly. Sad not to make it to #IAVCEI2025 and catch up in Geneva. Doing what we can from here to think about magma and volcanos.
June 29, 2025 at 9:14 PM
Skye-AVCEI - field teaching in 18degC and a gentle westerly. Sad not to make it to #IAVCEI2025 and catch up in Geneva. Doing what we can from here to think about magma and volcanos.
Reposted by John Maclennan
The typeset version of the 2022-2023 Fagradalsfjall paper is out, so let’s go over the main points of the paper 🌋
Mush Disaggregation and Dike Propagation Timescales at Active Volcanoes: Evidence from the 2022–2023 Fagradalsfjall Eruptions
Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi
academic.oup.com
June 18, 2025 at 10:16 AM
The typeset version of the 2022-2023 Fagradalsfjall paper is out, so let’s go over the main points of the paper 🌋
Reposted by John Maclennan
🚨🌋New paper on the geochemistry and petrology of the 2022–23 Fagradalsfjall eruptions on the Reykjanes Peninsula, Iceland. We study temporal variations in the magmatic plumbing system and link diffusion timescales to monitoring signals, tracing the timing of mush disaggregation and dike propagation
Mush disaggregation and dike propagation timescales at active volcanoes – Evidence from the 2022-2023 Fagradalsfjall eruptions
Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi
academic.oup.com
June 3, 2025 at 8:23 AM
🚨🌋New paper on the geochemistry and petrology of the 2022–23 Fagradalsfjall eruptions on the Reykjanes Peninsula, Iceland. We study temporal variations in the magmatic plumbing system and link diffusion timescales to monitoring signals, tracing the timing of mush disaggregation and dike propagation
Reposted by John Maclennan
Amazing work by @albertocaracciolo.bsky.social . It's the coolest diffusion timescale work I've ever seen. You can see each eruption priming and how they are related to one another. Just super cool science.
🚨🌋New paper on the geochemistry and petrology of the 2022–23 Fagradalsfjall eruptions on the Reykjanes Peninsula, Iceland. We study temporal variations in the magmatic plumbing system and link diffusion timescales to monitoring signals, tracing the timing of mush disaggregation and dike propagation
Mush disaggregation and dike propagation timescales at active volcanoes – Evidence from the 2022-2023 Fagradalsfjall eruptions
Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi
academic.oup.com
June 3, 2025 at 8:31 AM
Amazing work by @albertocaracciolo.bsky.social . It's the coolest diffusion timescale work I've ever seen. You can see each eruption priming and how they are related to one another. Just super cool science.
Reposted by John Maclennan
There are many ways to study rocks up-close! 🔬💎 These thin section drawings and images are of feldspar-pyroxene xenoliths, brought up from beneath Fagradalsfjall, Iceland, by erupted basalts🌋 #ThinSectionTuesday #Petrology
February 25, 2025 at 9:57 AM
There are many ways to study rocks up-close! 🔬💎 These thin section drawings and images are of feldspar-pyroxene xenoliths, brought up from beneath Fagradalsfjall, Iceland, by erupted basalts🌋 #ThinSectionTuesday #Petrology
Reposted by John Maclennan
My big paper on the 2021 Fagradalsfjall eruption is finally out! If you want to understand the recent eruptions on the Reykjanes Peninsula better, look no further: doi.org/10.1029/2024...
Let’s dive in to what we found: 🧵
1/8
Let’s dive in to what we found: 🧵
1/8
The Petrology and Geochemistry of the 2021 Fagradalsfjall Eruption, Iceland: An Eruption Sourced From Multiple, Compositionally Diverse, Near‐Moho Sills
We use high frequency sampling to observe rapid changes in lava composition during the 183 day 2021 Fagradalsfjall eruption The eruption was sourced from 12 to 15 km depth, corresponding to the l...
doi.org
November 28, 2024 at 8:09 AM
My big paper on the 2021 Fagradalsfjall eruption is finally out! If you want to understand the recent eruptions on the Reykjanes Peninsula better, look no further: doi.org/10.1029/2024...
Let’s dive in to what we found: 🧵
1/8
Let’s dive in to what we found: 🧵
1/8
Reposted by John Maclennan
We are excited to announce our Department will be hosting a series of new #PhD studentships, starting from Oct 2025! 🥳
The studentships will be in the field of environmental science, working on topics at the heart of some of the most pressing societal challenges #EarthScience
The studentships will be in the field of environmental science, working on topics at the heart of some of the most pressing societal challenges #EarthScience
November 26, 2024 at 10:51 AM
We are excited to announce our Department will be hosting a series of new #PhD studentships, starting from Oct 2025! 🥳
The studentships will be in the field of environmental science, working on topics at the heart of some of the most pressing societal challenges #EarthScience
The studentships will be in the field of environmental science, working on topics at the heart of some of the most pressing societal challenges #EarthScience
December 19, 2023 at 6:47 AM