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Cambridge Tephra Lab

@camtephra.bsky.social
301 followers 120 following 38 posts

Updates from the Cambridge Tephra Lab, Dept Geography, University of Cambridge.

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IAVCEI - International Association of Volcanology and Chemistry @iavcei.bsky.social · 16/09/2026
🌋 August 2026 Compilation of Bulletin of Volcanology! 🌋 9️⃣ "Measuring the electrical charge and settling velocity of volcanic ash with a new, cost-effective apparatus (VoltAsh) both in the laboratory and in the field". Fries et al. link.springer.com/article/10.1... (10/10)
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david zhang @jz-volc.bsky.social · 07/09/2026
Folks, im happy to share our work, on new evidence for ash venting alongside rhyolitic lava effusion, from Iceland, which we argue is a general & widespread hazard of silicic systems — newly-(properly)-published, open access, on nat comms: doi.org/10.1038/s414...
doi.org
Sustained ash emission during lava effusion is a hidden volcanic hazard of silicic eruptions - Nature Communications
The study presents field evidence that Iceland eruptions of silicic lava are typically accompanied by long-lasting ash plumes but remain hidden in the tephra record. This potential hazard should be ap...
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Oxford Tephrochronology Group @oxfordtephra.bsky.social · 07/09/2026
🌋 Check out our new paper!! We demonstrate how IntChron can support the management, visualisation and analysis of increasingly large #tephra geochemical datasets, bringing together >7,000 analyses from 12 publications. doi.org/10.1002/jqs....
doi.org
Managing and visualising geochemical data for tephra correlation with the <i>IntChron</i> Integration Tool
There is now a wealth of glass-shard geochemical data for volcanic ash (tephra) layers from a wide range of volcanoes and eruptions, providing invaluable datasets for tephrochronology. However, compi...
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Cambridge Tephra Lab @camtephra.bsky.social · 06/09/2026
www.theguardian.com/world/2026/s...
theguardian.com
Volcanic ash cloud halts flights at five Indonesian airports, including Jakarta’s
Anak Krakatau eruption disrupts 301 flights, affects fishing and some school activities
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British Geological Survey @bgs.ac.uk · 28/08/2026
Scientists have found evidence of a long-hidden link between an ancient buried ash layer in Scandinavia and a concealed supervolcano in eastern England, changing our understanding of England’s geological past. 🌋 www.bgs.ac.uk/news/secrets...
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Cambridge Tephra Lab @camtephra.bsky.social · 21/08/2026
We ran the annual summer school “Volcanic Ash” practical this week. Sixteen new and enthusiastic tephrochronologists…who may never tephrochronologise again. But *we* had fun 🌋
Two women, both dressed in black, smiling together at the camera. One is holding some volcanic rocks - black vesicular (frothy-looking) lava. They appear to be in a lab, but much of it can be seen behind them.
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Reposted by Cambridge Tephra Lab
PARK Jinheum @jinheum.bsky.social · 10/08/2026
Great article in Ars Technica by Jacek Krywko about our recent publication. Many thanks!
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Cambridge Tephra Lab @camtephra.bsky.social · 04/08/2026
Find out how @jinheum.bsky.social, @chslane.bsky.social & colleagues carried out a forensic study of varve sediments from Lake Chala to constrain the season and climatic impact of the 74,000 yr Toba super-eruption 🌋🔬🌏 doi.org/10.1126/scia... [spoiler: it was within background climate variability]
A three panel figure:
1. Simple rectangualr map of Africa, Southern Asia, the Indian Ocean area and across to W Australia. The location of the Toba caldera in Sumatra is indicated, as well as the locations that ash has been found. These are mainly across the E Indian Ocean, peninsula India and a few dots for cryptographers discoveries in E and S Africa. 
2. A photo of the surface of a sediment core, spanning 10-20 cm, revealing laminations in dark-light layers. The position of ash from the Toba eruption is indicated in the centre of the image.
3. A close up image taken under high powered microscopy of an ~500 um diameter view of the sediment core, centred on the Toba ash layer (particles appear irregularly shaped and white, arranged in a clear horizontal band). Algal remains are also seen, picking out seasonal layers.
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Helen Innes @heleninnes.bsky.social · 22/05/2026
🚨🌋❄️Delighted to share our paper identifying Newberry Pumice tephra in Greenland ice at 686 CE, and investigating other 7th Century eruptions associated with climate cooling is now available online in Quaternary Science Reviews. 🌋❄️🚨 doi.org/10.1016/j.qu...
doi.org
Redirecting
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Christine S. Lane @chslane.bsky.social · 12/01/2026
📣 Studying tephra in archaeology? Then submit an abstract to our #tephratastic session at the European Association for Archaeologists #EAAs in Athens this summer. 🌋🏛️ Session #203 “Advances in Tephrochronology for Archaeological Research”. 👉5th Feb deadline👈 More info: bit.ly/3LCcuyy
Session abstract:
Tephrochronology is one of the most effective tools for building precise and independent chronological frameworks that link archaeological, palaeoenvironmental, and geological archives. By relating tephra layers to eruptive events, it establishes isochrons – time-synchronous surfaces that enable stratigraphic sequences to be correlated across regions with exceptional precision. In recent years, the study of cryptotephra – fine-grained (<125 μm) volcanic glass shards preserved in sediments far from their source – has profoundly expanded the potential of this approach. The identification and geochemical fingerprinting of these invisible ash layers now allow long-distance correlations, extending the applicability of tephrochronology to regions and contexts once considered beyond its reach.
This session focuses on how the integration of tephra studies into archaeological research is transforming our ability to correlate, date, and interpret the complex relationships between human activity, archaeological cultures, landscape evolution, and volcanic events across space and time. By bringing together examples from different regions and periods—from prehistoric to historical contexts—the session will highlight the diversity of applications and the growing analytical precision that characterise this rapidly evolving field.
We welcome contributions demonstrating how both visible tephra and cryptotephra layers have been used to refine archaeological chronologies, synchronise cultural and environmental sequences, or strengthen the chronological control of multiproxy datasets. Methodological and case-study papers are equally encouraged, especially those integrating tephrochronology with geoarchaeological and palaeoenvironmental methods such as micromorphology, sedimentology, and palaeoecological analyses. Research from regions traditionally considered “tephra-poor”, where cryptotephra discoveries are revealing new temporal anchors, is particularly welcome.
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Christine S. Lane @chslane.bsky.social · 09/01/2026
#Tephratastic PhD alert!! Study the record of volcanism hidden in the sediments of Lake Ohrid with the brilliant @pgalbert.bsky.social…and even better, you’d live on the Welsh coastline 🏴󠁧󠁢󠁷󠁬󠁳󠁿🌊☀️ Bad news: deadline is Monday 12th Jan!! 🧑‍💻 More info: bit.ly/4pu3FVu
A screenshot of the title of a PhD project:

“New insights into the timing and scale of past Mediterranean volcanism and climate change from Lake Ohrid (Macedonia/Albania)
Swansea University
Crocus DLA”
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Cambridge Tephra Lab @camtephra.bsky.social · 07/01/2026
This looks exciting - a new scanning method to detect tephra 👌🌋🧪🔬
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Commission on Tephrochronology @cot-iavcei.bsky.social · 12/12/2025
Just going to repost this - EGU is looking pretty special this year, especially for the tephra fans out there! #geology #volcano #tephra #egu2026 @egu.eu @iavcei.bsky.social 🌋🧪⚒️
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Cambridge Tephra Lab @camtephra.bsky.social · 11/12/2025
What’s the collective noun for a cluster of geographers rarely seen out of the labs? Seasons Greetings from Cambridge everyone! 🎄✨🎄✨🎄✨🎄 @camunigeography.bsky.social
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Paul Byrne @theplanetaryguy.com · 07/12/2025
Stunning footage from earlier today, when the new Kilauea eruption covered the USGS Webcam 3, which is situated in the Halemaʻumaʻu crater near the southern rim of the much larger Kilauea caldera. This *isn't* what the people of Pompeii saw. But it's not very far off.
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Cambridge Tephra Lab @camtephra.bsky.social · 29/11/2025
Not all tephra travels by air…
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JGR: Oceans @jgroceans.bsky.social · 29/11/2025
Pumice rafts are floating mats of volcanic rock from the eruption of underwater or coastal volcanoes. Monteath et al., analyze the chemistry of pumice from the Falkland Islands and trace its origin from ∼20,000 km away in the South Sandwich Islands 🌊 agupubs.onlinelibrary.wiley.com/doi/10.1029/...
Crew of the HMS Protector inspecting a large pumice clast (∼40 cm in diameter) from the 1962 Protector Shoal raft
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Dr. Erik Klemetti Gonzalez @eruptions.site · 23/11/2025
Here is a hastily constructed animated gif from different NASA satellites showing the progression of the Hayli Gubbi eruption. Note the tall ash plume spreading NE (right) and a lower, light tan ash flow(?) moving NNW. #eruption #volcano
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Christine S. Lane @chslane.bsky.social · 14/11/2025
Two weeks until our 2/12 PhD funding deadline! If you’re interested in a cryptotephra research project and joining @camtephra.bsky.social there’s still time drop me an email to discuss your ideas. Dept funding info: www.geog.cam.ac.uk/postgraduate... NERC DLA: nercdtp.esc.cam.ac.uk/StaffDirecto...
A grey, unoccupied lab with sink, centrifuge and shelvesA hand holding a tally counter with 294 showing, next to the stage of a microscope. There is a slide on the microscopeA row of labelled centrifuge tubes, with white caps, in a test tube rack.A few platy fragments of glass viewed under high powered optical microscopy.
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Cambridge Tephra Lab @camtephra.bsky.social · 12/11/2025
Cambridge Tephra Lab paper hot off the press: read how (2022-23 masters student) @elowilkinsonrowe.bsky.social used tephra layers in lakes to reconstruct Holocene explosive eruptions from the Main Ethiopian Rift. #tephratastic www.sciencedirect.com/science/arti...
sciencedirect.com
Refining Late Holocene explosive eruption histories of the Main Ethiopian Rift with lake sediment tephra records
The Main Ethiopian Rift (MER) hosts a rapidly growing population exposed to eruption hazards from ∼60 active Holocene volcanoes. The geological record…
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Dr Alice Paine @alicerpaine.bsky.social · 08/11/2025
~100,000 years of rainfall… 💦
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Oxford Tephrochronology Group @oxfordtephra.bsky.social · 16/10/2025
🚨New paper! Our latest study, led by Sophie Vineberg, integrates proximal & distal tephra records to reveal the timing and dispersal of large explosive eruptions at Aso volcano (Japan) 🌋 🔗 doi.org/10.1016/j.jvolgeores.2025.108436 #tephra #volcanology #Aso #Japan #LakeSuigetsu #tephrochronology
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Cambridge Tephra Lab @camtephra.bsky.social · 14/10/2025
Another reason to ♥️ volcanic ash
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Cambridge Tephra Lab @camtephra.bsky.social · 11/10/2025
Wonderful tephra layer revealed in this peat core sample. Follow the thread to find out where from… 🌋✨
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Cambridge Geography @camunigeography.bsky.social · 26/09/2025
🌍 Curious about Geography? Ready to explore what it’s like to study your favourite subject at @cam.ac.uk? Don't miss our virtual Geography Subject Masterclass on 16 October 2025!
A promotional banner for the Cambridge Geography Subject Masterclass. The left side features a solid teal background with dark text reading: 'Geography Subject Masterclass 16 October 2025 Book now!'. The right side shows a partial photograph of two young students standing outdoors on a university campus, smiling at each other, with autumnal red foliage and a stone building visible in the background.
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Cambridge Geography @camunigeography.bsky.social · 25/09/2025
Dept of Geography's Prof Christine Lane @chslane.bsky.social was at the Romanian Academy, Cluj, for the "Integrating ice core, marine & terrestrial environments" network meeting. The two-day event was a great success, with current and former @camtephra.bsky.social members presenting their research.
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Cambridge Tephra Lab @camtephra.bsky.social · 25/09/2025
Last week PhD student @yqnatdeng.bsky.social and @chslane.bsky.social were sampling cores from an Ethiopian lake…in Aberystwyth! Here’s hoping there’s lots of ancient cryptotephra to be found! #tephratastic
A women stands by a wooden lab desk with a spatula held over a drainpipe filled with sediment. Close up of a sediment core with a small channel of samples removed (plus a couple of bigger gaps from previous sampling). A labelled drainpipe lies alongside, plus a centrifuge tube rack with labels filled tubes in it.
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Danielle McLean @danmclean.bsky.social · 29/08/2025
🌋📢 Calling all #tephra researchers! Join us in shaping this new JQS Special Issue. "Beyond the #Eruption – Advances and Applications in Distal Tephra Analysis Across the Geosciences" Deadline: 2 Jan 2026. Further details below: onlinelibrary.wiley.com/page/journal...
onlinelibrary.wiley.com
Journal of Quaternary Science Call for Papers Beyond the Eruption: Advances and applications in distal tephra analysis across the Geosciences
<em>Journal of Quaternary Science</em> publishes papers on any field of Quaternary research, advancing understanding of earth's history over the last 2.58 million years.
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Christine S. Lane @chslane.bsky.social · 11/09/2025
We’ve had two days of science in beautiful Cluj as the “Integrating ice core, marine & terrestrial environments” network met for an open meeting. Photos of past/present @camtephra.bsky.social members presenting their work and the birthday flowers they embarrassed me with. @jinheum.bsky.social
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Cambridge Tephra Lab @camtephra.bsky.social · 19/08/2025
LST floating in LST. Small pleasures 🤓🌋 (Laacher See Tephra floating in the heavy liquid, lithium metatungstate)
A close up of a purple gloved hand in a lab, holding a transparent centrifuge tube, hand-labelled CT5015. The tube is approx 1/3 full with a clear liquid, floating at the top of which is a brownish cloud of fine particles. There is a dark residue at the very base of the tube, barely seen.
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Alaska Public Media @alaskapublic.org · 12/08/2025
Volcanic ash originating from Russia’s Kamchatka Peninsula canceled Alaska Airlines flights to Nome and Kotzebue Tuesday morning. The ash plume came from the Klyuchevskoy volcano, prompting an advisory from the Alaska Volcanic Ash Advisory Center.
alaskapublic.org
Alaska Air flights to Nome and Kotzebue canceled due to volcanic ash from Kamchatka
Klyuchevskoy erupted shortly after a magnitude 8.8 earthquake two weeks ago.
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PARK Jinheum @jinheum.bsky.social · 05/07/2025
We report a cryptotephra deposit from a ~120 ka Tondano eruption in a sediment core from Lake Towuti (Indonesia)! doi.org/10.1002/jqs....
doi.org
Cryptotephra from a ~120 ka Tondano eruption in a sediment core from Lake Towuti (Indonesia)
Southeast Asia is one of the most volcanically active regions in the world, yet their long-term eruptive history has been comparatively little studied. In particular, little work has explored the pot....
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Ben Black @magmatist.bsky.social · 05/07/2025
Some nice fresh looking tephra from Laki. Imagine these fragments quenching in fire fountains a kilometer high
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Jess Phoenix 🌋 @volcanojess.com · 08/07/2025
🌋 Lewotobi Laki-laki volcano is at it again. Biggest hazards are lahars and volcanic ash (the latter being particularly bad for air traffic). Stay safe, Indonesians! www.bbc.com/news/article...
bbc.com
Indonesian volcano Mount Lewotobi Laki-laki spews massive ash cloud as it erupts again
Following a series of eruptions three weeks ago, Mount Lewotobi Laki-laki has begun spewing hot ash and lava again.
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Cambridge Tephra Lab @camtephra.bsky.social · 10/07/2025
Cambridge tephrochronologists discover Holocene wall art from the “other place”… 👀 Come visit anytime @oxfordtephra.bsky.social
A photo of a whiteboard with doodles on it. In red marker is a crude sketch of an erupting volcano depositing ash in the sediments beneath a lake. Some strange dancing figures appear (are they volcanic bombs with legs?!) in the distal zone. Above the volcano someone has drawn a face with long hair and glasses (that could be a few of us in the lab past/present) and written “Oxford Tephra says Hi!!” In upper case. There is also an irregular spiky tephra shard outline. You can make out the feint reflection of the photographer and an academic poster on the wall opposite.
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DeniseG @denisegutzmer.bsky.social · 26/06/2025
Megadrought Reveals Volcanic Ash at Lake Mead Volcanic ash from volcanoes in Wyoming, Idaho, and California was deposited in the rocks along the shore. The ash samples ranged from 6 million to 12 million years old. #drought #LakeMead 🧪 www.discovermagazine.com/planet-earth...
discovermagazine.com
Megadrought Reveals Volcanic Ash at Lake Mead, Giving Us a Better Look at the Lake's Past
Learn more about the volcanic ash researchers found in the sediment around Lake Mead’s now exposed shoreline, and how it could help us in the future.
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Cambridge Tephra Lab @camtephra.bsky.social · 03/07/2025
Thanks to Alex Mattin [ www.wgtn.ac.nz/antarctic/ab... ] for visiting yesterday and giving a fascinating talk about his search for tephra from the ~25 kyr Ōruanui eruption in Antarctic ice cores!
wgtn.ac.nz
Alexander Mattin | Te Puna Pātiotio / Antarctic Research Centre | Te Herenga Waka—Victoria University of Wellington
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Cambridge Tephra Lab @camtephra.bsky.social · 25/06/2025
Congrats! But we will miss you @jinheum.bsky.social 😭
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The Conversation U.S. @us.theconversation.com · 18/06/2025
Here's the link: theconversation.com/volcanic-ash...
theconversation.com
Volcanic ash is a silent killer, more so than lava: What Alaska needs to know with Mount Spurr likely to erupt
When volcanoes like Alaska’s Mount Spurr erupt, the ash can damage people’s lungs, smother crops and kill animals, and the harm can continue to spread long afterward.
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Dave Rodland @daverodland.bsky.social · 09/05/2025
Welcome home, my beloveds, to #FossilFriday 🧪⚒️. I've spent most of the week deep in the collection, trying to get a basic count together as we look at moving to a new home. Sometimes you find things you never realized were there all along. Here, plant fossils from the Florissant Fm.
Fragmentary plant fossils (leaves and stems) in a fine-grained shale matrix.Fragmentary plant fossils (leaves and stems) in a fine-grained shale matrix.
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UAlberta Volcanic Ash Research Group @tephrotastic.bsky.social · 14/03/2025
New opportunities in Canada 🇨🇦 @oxfordtephra.bsky.social @camtephra.bsky.social @tephraportal.bsky.social @volcancanuck.bsky.social
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Cambridge Tephra Lab @camtephra.bsky.social · 18/01/2025
Our good old friend the Laacher See Tephra in a speleothem! #tephratastic @swinnyy.bsky.social
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Cambridge Tephra Lab @camtephra.bsky.social · 15/01/2025
This is wonderful footage. Enjoy
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Cambridge Tephra Lab @camtephra.bsky.social · 31/12/2024
The Cambridge Tephra Lab wishes you all a Tephratastic new year!
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Cambridge Tephra Lab @camtephra.bsky.social · 06/12/2024
Sediment sending me some love while sieving for #tephra 🤎🥺
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PARK Jinheum @jinheum.bsky.social · 14/11/2024
It was great to visit Oxford to speak at the seminar in School of Archaeology on Tuesday!
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Cambridge Tephra Lab @camtephra.bsky.social · 18/11/2024
What a view that is @palaeobecca.bsky.social 🤩 Looking forward to many more shots of your field and lab work!
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Cambridge Tephra Lab @camtephra.bsky.social · 14/11/2024
From one volcanic ash lab to another, welcome to Bluesky @tephrotastic.bsky.social 🌋⚒️ I’ll show you mine, you show me yours 😉 …Here’s a close up of a beautiful microvesicular glass shard from the ~8 kyr BP Mercato tephra, sampled near Naples 🤩
A greyscale SEM close up of a vesicular  (shaped by gas bubbles) microscopic volcanic glass shard. Curved glass surfaces, bubble forms, some dust particles and some delamination (hydration?) of the glass can be seen. A scale bar indicates the whole image is less than 200 microns across. Text at the top says “Cambridge Tephra Lab”.
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Christine S. Lane @chslane.bsky.social · 10/11/2024
Given the new followers👋 I’ll reintroduce myself: I use volcanic ash to date sediments hiding secrets of past climates & people. Prof in Cambridge Uni Geography & Corpus Christi College. Likes: field & lab teaching, tephra-hunting, family time. Follow my group @camtephra.bsky.social Now your turn…
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Mindy Weisberger @laminda.bsky.social · 08/11/2024
Wow, hello new people! This is a weird, sad, scary time, but welcome & I hope you'll stay a while. I mostly post about science and I lean toward the strange stuff. Speaking of which, do you like trilobites? Here are some that were smothered in volcanic ash & preserved in 3D, 515 million years ago 🧪
edition.cnn.com
‘Prehistoric Pompeii’ reveals 515 million-year-old sea bugs’ anatomy in pristine 3D | CNN
A volcanic eruption in what’s now Morocco preserved ancient trilobite specimens in nearly pristine condition about half a billion years ago, according to a new study.
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