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Dr Dave Giles

@davyg50

Engineering Geologist, field trip organiser, Pompey fan & New Order/Moby appreciator

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14.11.2024
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Latest posts by Dr Dave Giles @davyg50

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One simple law explains rock strength across 7️⃣ orders of magnitude of stress — with implications for 🌋 earthquakes, 🏔️ landslides, and 🧪 material science.

🔗 Read more: seismica.library.mcgill.ca/article/view...

03.03.2026 16:45 👍 2 🔁 1 💬 0 📌 0

It’s not difficult to imagine what Winston Churchill would have made of Donald Trump…

03.03.2026 18:18 👍 1838 🔁 247 💬 168 📌 25
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"We called London a war zone and moved to Dubai by mistake"

03.03.2026 08:16 👍 6591 🔁 1563 💬 91 📌 45

More #urbangeology walks this year with #LondonWalks

02.03.2026 18:51 👍 17 🔁 6 💬 0 📌 0

Is FIFA going to ask for their peace prize back?

28.02.2026 19:06 👍 29 🔁 2 💬 3 📌 0
A group photo of the team, including LGP members, local residents and representatives of Thames Tideway, Museum of London Archaeology and the excavation contractors. The board is in the centre, and our youngest participant wears his red dinosaur jump suit and brought his digger truck.

A group photo of the team, including LGP members, local residents and representatives of Thames Tideway, Museum of London Archaeology and the excavation contractors. The board is in the centre, and our youngest participant wears his red dinosaur jump suit and brought his digger truck.

A photo of the information board ‘Layers of Bermondsey’. It includes a painting by Gail Dickerson, representing the geological layers beneath Bermondsey  and painted with pigments purified from these sediments. There is a geological cross section, showing how the Thames Tideway tunnel intersects the geology in its route along the Thames. There are also pictures of Gail’s rock samples and pigments and a map of SE England showing the migration of the course of the river Thames over the last million years. Final an image from the museum of London archaeology service shows a human skeleton wearing thigh length leather boots (yes you did read that correctly) being excavated on the Bermondsey foreshore.

A photo of the information board ‘Layers of Bermondsey’. It includes a painting by Gail Dickerson, representing the geological layers beneath Bermondsey and painted with pigments purified from these sediments. There is a geological cross section, showing how the Thames Tideway tunnel intersects the geology in its route along the Thames. There are also pictures of Gail’s rock samples and pigments and a map of SE England showing the migration of the course of the river Thames over the last million years. Final an image from the museum of London archaeology service shows a human skeleton wearing thigh length leather boots (yes you did read that correctly) being excavated on the Bermondsey foreshore.

A close up of Gail’s painting on the border showing the rock layers depicted in Earth pigments

A close up of Gail’s painting on the border showing the rock layers depicted in Earth pigments

A close up of the cross section showing the position of the tunnel relative to geology under the Thames. A circular graphic also illustrates the tunnel, which is the width of three buses.

A close up of the cross section showing the position of the tunnel relative to geology under the Thames. A circular graphic also illustrates the tunnel, which is the width of three buses.

A special day for LGP today! Formal inauguration of our Layers of Bermondsey sign at Chambers Wharf this morning 🧵

20.02.2026 20:32 👍 9 🔁 3 💬 1 📌 0

Reform UK want to scrap the Equality Act and leave the ECHR. Yes, this will leave ordinary people open to being exploited by unscrupulous business owners and politicians, but my rich donors and I promise not to take advantage. Trust me, I'm a man of the people.

19.02.2026 09:13 👍 463 🔁 129 💬 10 📌 1
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Leavitt says Truth Social posts are direct from Trump despite his claims otherwise Officials previously blamed a staffer for a grotesquely racist video reposted by the president’s account earlier this month

Karoline Leavitt says all Truth Social posts are straight from Trump...week after he blamed staffer for racist Obama video

18.02.2026 20:03 👍 84 🔁 34 💬 12 📌 4

Who better to have as Chancellor than Robert Jenrick, the man who helped a billionaire pornographer avoid £45m tax in exchange for a £10k donation.

17.02.2026 15:53 👍 519 🔁 165 💬 11 📌 1
Figure of floodplain startigraphy of the late-glacial Neckar palaeochannel with multiproxy data

Figure of floodplain startigraphy of the late-glacial Neckar palaeochannel with multiproxy data

Map of the study area in the northern Upper Rhine Graben, southwestern Germany

Map of the study area in the northern Upper Rhine Graben, southwestern Germany

Title page of the article: Henselowsky, F., Kadereit, A., Herzog, M., Tuczek, B., Thiemeyer, H., Bubenzer, O., and Engel, M.: Historical clay extraction from paleo-channel deposits of the late-glacial Bergstraßenneckar in the Upper Rhine Graben, southwestern Germany, E&G Quaternary Sci. J., 75, 33–47, https://doi.org/10.5194/egqsj-75-33-2026, 2026.

Title page of the article: Henselowsky, F., Kadereit, A., Herzog, M., Tuczek, B., Thiemeyer, H., Bubenzer, O., and Engel, M.: Historical clay extraction from paleo-channel deposits of the late-glacial Bergstraßenneckar in the Upper Rhine Graben, southwestern Germany, E&G Quaternary Sci. J., 75, 33–47, https://doi.org/10.5194/egqsj-75-33-2026, 2026.

This study on historical clay extraction in the floodplain the late-glacial palaeo-channel of the Neckar river evolved from several undergrad field courses and is our first collaboration with the #Hessen State Archive @uniheidelberg.bsky.social @henselowsky.bsky.social

doi.org/10.5194/egqs...

16.02.2026 07:59 👍 2 🔁 2 💬 0 📌 1
Cover page for Durham Rocks: 50 extraordinary places that tell the story of the Durham landscape. Photograph shows a rocky coastline, a swirling sea with an old rusty axle, metal wheels in the foreground. Cliffs in the distant left, a sunset sky, light cloud.

Cover page for Durham Rocks: 50 extraordinary places that tell the story of the Durham landscape. Photograph shows a rocky coastline, a swirling sea with an old rusty axle, metal wheels in the foreground. Cliffs in the distant left, a sunset sky, light cloud.

Recently uploaded to GeoGuide: Ian Jackson's richly illustrated guide to Durham geology for the non-expert. geoguide.scottishgeologytrust.org/p/nr_durh/nr...

14.02.2026 21:18 👍 5 🔁 4 💬 0 📌 0
An example area with the dataset, symbolised by BGS Lexicon code and labelled with formation names.

An example area with the dataset, symbolised by BGS Lexicon code and labelled with formation names.

Quaternary UK offshore data digitised for the first time.

The dataset will help users, particularly those in the offshore renewables sector, and can be used for reference when completing site investigations.

Learn more:
www.bgs.ac.uk/news/quatern...

15.02.2026 10:15 👍 6 🔁 3 💬 0 📌 0
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It’s so funny to think about the fact that there’s people out there deferring every life decision to this

14.02.2026 09:53 👍 12768 🔁 2954 💬 314 📌 266
A drawn image of a sunny beach scene. To the right is a large cliff and to the left is a village with fields behind it, and in front a beach area. The artist (Cath Pennington, BGS) has drawn various cliff-based hazards, which can be spotted as one studies the image.

A drawn image of a sunny beach scene. To the right is a large cliff and to the left is a village with fields behind it, and in front a beach area. The artist (Cath Pennington, BGS) has drawn various cliff-based hazards, which can be spotted as one studies the image.

Cliffs might seem strong and safe but they can provide many hazards. Storms, prolonged periods of wet weather, cold snaps and heatwaves can trigger landslides.

Check the image below to see if you can spot the cliff-based hazards in this scene. Answers here: www.bgs.ac.uk/discovering-...

08.02.2026 10:00 👍 28 🔁 16 💬 3 📌 0

⚒️

07.02.2026 19:21 👍 8 🔁 1 💬 0 📌 0
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Went to see Tutankhamun Exhibition on Tuesday it was worth the 3 hours wait.

06.02.2026 11:39 👍 236 🔁 28 💬 15 📌 3
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Future Supercontinent Will Be Inhospitable for Mammals - Eos Pangea returns in 250 million years, and it’s not looking good for us.

It sounds like something from a sci-fi movie: Continents collide and volcanoes erupt. Toxic gases fill the air. The planet becomes a hot desert devoid of life. But that scenario could predict Earth in several million years as the continents merge into Pangea Ultima.

eos.org/articles/fut...

02.02.2026 15:59 👍 14 🔁 5 💬 1 📌 1
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Insights for Making Quick Clay Landslides Less Quick - Eos In a quick clay landslide, solid soil liquefies suddenly, sometimes washing over entire towns. New modeling examines what kinds of salts could help stabilize these clays.

Quick clay landslides can liquefy entire hillsides with little to no warning. In far northern countries where they occur, researchers are searching for new ways to stabilize soils, digging down to the molecular level.

01.02.2026 19:37 👍 5 🔁 3 💬 0 📌 0
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Insights for Making Quick Clay Landslides Less Quick - Eos In a quick clay landslide, solid soil liquefies suddenly, sometimes washing over entire towns. New modeling examines what kinds of salts could help stabilize these clays.

Quick clay landslides can liquefy entire hillsides with little to no warning. In far northern countries where they occur, researchers are searching for new ways to stabilize soils, digging down to the molecular level.

30.01.2026 18:36 👍 6 🔁 5 💬 0 📌 0
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Happy Anniversary to the Jurassic Coast World Heritage Site!

The inception of the WHS was 25 years ago today! We will be celebrating over the course of 2026, so stay tuned for lots of events and activities! #UNESCO #worldheritagesite #jurassiccoast

21.01.2026 07:37 👍 8 🔁 2 💬 0 📌 1
Image cutout shows a large landslide extending from the wall of a mound onto the flatter terrain below.

Image cutout shows a large landslide extending from the wall of a mound onto the flatter terrain below.

HiPOD: A Landslide of Mars

This stunning image shows a landslide in Sirenum Fossae, just on the edge of Daedalia Planum, where multiple lava flows have occurred. What was the geometry of the failure that caused it?

https://uahirise.org/hipod/ESP_076597_1540
NASA/JPL-Caltech/University of Arizona

16.01.2026 15:01 👍 41 🔁 12 💬 1 📌 0
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I'm delighted to welcome Robert Jenrick to Reform! One thing our party urgently needs is more frauds.

15.01.2026 20:44 👍 361 🔁 99 💬 19 📌 1
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"Idea for a TV show – it's called The Traitors and features a group of Reform politicians competing to win the grand prize of 500,000 Rubles.."

13.01.2026 15:39 👍 304 🔁 74 💬 5 📌 0
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Reform unveiled their latest Conservative recruit Nadhim Zahawi - unfortunately he forgot to delete his old tweets accusing Farage of racism...

12.01.2026 17:00 👍 1235 🔁 297 💬 32 📌 12

Daily Telegraph reporting Nadhim Zahawi was denied a Conservative peerage weeks before he defected to Reform, Tory sources claim

Zahawi said to have made "multiple approaches" in late 2024, asking to be on the most recent political peerages list.

"We were very clear he wasn’t going to get one.”

12.01.2026 18:37 👍 222 🔁 54 💬 32 📌 7
Hand holding up a copy of a book called meltdown

Hand holding up a copy of a book called meltdown

Reading @snowhydro.bsky.social ‘s excellent memoir MELTDOWN & this line resonates: “dan’s ( @hemlock932.bsky.social ) hands-on observational approach brought the landscape to life & fuelled my desire for fieldwork. I started to feel that a science degree might actually be interesting after all.” 🧪⚒️

12.01.2026 19:53 👍 25 🔁 9 💬 2 📌 0

Nadim Zahawi arrived in the UK from Iraq as a child refugee. His family claimed asylum once they were here. Today he has joined Reform who will stop all in country asylum applications. Under his new party, his own family fleeing persecution would be immediately deported.

12.01.2026 11:25 👍 4879 🔁 1809 💬 302 📌 108
Three BGS geologists studying the core in the National Geological Repository.

Three BGS geologists studying the core in the National Geological Repository.

Did you miss out on all the geological news over the festive period? Our newsletter is here to get you back up-to-date:

BGS scientists gain access to 'once in a lifetime' core
A major update to our mapping data
Using AI to forecast earthquakes

Catch up here:
content.govdelivery.com/accounts/UKB...

11.01.2026 09:30 👍 3 🔁 1 💬 0 📌 0
A lump of Lowestoft Till from Finningham, Suffolk. The matrix is grey with brown mottlings and is studded with lumps of white chalk. The overall effect is rough and craggy. Image courtesy megwildlflowers@bsky.social.

A lump of Lowestoft Till from Finningham, Suffolk. The matrix is grey with brown mottlings and is studded with lumps of white chalk. The overall effect is rough and craggy. Image courtesy megwildlflowers@bsky.social.

An excavated hole about 1.5 deep in Lowestoft Till subsoil at Finningham, Suffolk. The till is grey at depth and has a paler, weathered and partly decalcified yellow-brown surface layer. There are pebbles of chalk visible. Image courtesy megwildlflowers@bsky.social.

An excavated hole about 1.5 deep in Lowestoft Till subsoil at Finningham, Suffolk. The till is grey at depth and has a paler, weathered and partly decalcified yellow-brown surface layer. There are pebbles of chalk visible. Image courtesy megwildlflowers@bsky.social.

The arithmetics of glacial till from the Suffolk plateau: Jurassic Kimmeridge Clay + Cretaceous Chalk + Pliocene Crag + Pleistocene erratics from W Midlands, E Midlands, Pennines, Northumbria, Scotland, N Sea, etc, mashed under a colossal ice sheet = the Lowestoft Till.
It's a beast of a deposit.

10.01.2026 16:46 👍 388 🔁 41 💬 8 📌 1
A detail of ricks and brick wasters made from the local caly and silt and used to construct a Victorian folly in Gunnersbury Park.

A detail of ricks and brick wasters made from the local caly and silt and used to construct a Victorian folly in Gunnersbury Park.

A view of an ornamental lake at Gunnerbusry Park. Lily pads are growing in the foreground, and the lake stretches away, reflecting the blue sky and at the far end, a white and glass constructed greenhouse, designed in the classical style. A small fountain is operating towards the far end of the lake. In the background are cedar trees.

A view of an ornamental lake at Gunnerbusry Park. Lily pads are growing in the foreground, and the lake stretches away, reflecting the blue sky and at the far end, a white and glass constructed greenhouse, designed in the classical style. A small fountain is operating towards the far end of the lake. In the background are cedar trees.

The latest edition to our Greater London Authority #geosites is Gunnersbury Park in Hounslow. The geology is mainly Langley Silt Member, Maidenhead Formation (Pleistocene-Holocene) and parts of the current park were once brick pits. More at londongeopartnership.org.uk/wp/wp-conten... #londongeology

11.01.2026 13:42 👍 7 🔁 2 💬 2 📌 0