A big thanks to Duncan Grieg and @ucllifesciences.bsky.social for inviting to talk yesterday on what we can learn from #urbanpalaeontology and #urbangeology

#MolluscMonday Small (<2 cm) glycymerid bivalve shell with characteristic taxodont dentition. Photographed on a building stone (almost certainly Oligocene Calcaire à astéries) in St Émilion, the famous centre for Bordeaux wine.

One of the things I’m often asked when identifying rocks & minerals is ‘is this a meteorite?’ The answer is always no; what they have found is industrial slag. These are slags from the Thames near Rainham where Murex Ltd metal works were located #londongeology #metalslags #mineralindustry

The Ilford Mammoth skull is in @nhm-london.bsky.social and there is a cast in Redbridge Museum, Ilford.

A mosaic of ‘Marley the Ilford Mammoth’ made from plastic bottle tops by artist Caitlin Atherton commemorates a mammoth skull excavated in 1863 from Uphall brick pits, Ilford. It’s a steppe mammoth, which lived c 200,000 ka 🦣 londongeopartnership.org.uk/wp/wp-conten... #londongeology

Save the date! Join us and our colleagues from @rockwatch.bsky.social on Saturday 7th November 2026 from 10.30am - 4.30pm at Burlington House in London for our FREE Festival of Geology. Full details coming soon via our website: geologistsassociation.org.uk/festival/

Low tide at Lambeth...

I finally had the opportunity to visit the @urbanlearners.bsky.social’s ‘If stones could speak’ pavilion in St Paul’s churchyard. Gabions display architectural and archaeological material from London including details in Portland and Reigate stone and a lovely Mayen basalt quernstone #urbangeology

A splendid piece of #urbangeology in Principal Place, London EC2A. Colour Field by artist collaboration Objects of Common Interest reuses stone - mainly Iranian travertines & Italian marble - salvaged from demolition projects. It’s there until September and part of London Festival of Architecture

Greggs' pays tribute to Harry Kane by renaming Blackhorse Road store Greggs' Blackhorse Road store has been renamed KANES https://walthamforestecho.co.uk/2026/07/14/greggs-pays-tribute-to-harry-kane-by-renaming-blackhorse-road-store/

This is an interesting and well-informed article in the CIBSE Journal on the problems of both heating and cooling in the London Underground and what the London Clay has to do with all this www.cibsejournal.com/technical/lo... #londongeology

The geology and Chalybeate Wells of Hampstead explored in my post at alondoninheritance.com/under-london...

A recce trip to Keston Common yesterday to do a site audit and plan a route for our Geotrail in October. Keston Common is one of our designated Greater London Authority geosites. Watch this space for information about the upcoming Geotrail! #londongeology #bromley

Are there blue birds over the white cliffs of Croydon? Possibly not, but here are our volunteers at last year’s geoconservation day at Riddlesdown pit. Find out more about London’s geology at londongeopartnership.org.uk/londons-geol... #LondonGeology #Chalk

Harmondsworth Barn is one of @londongeodiversity.bsky.social's Sites of Geological Interest and you can read more about it here londongeopartnership.org.uk/wp/wp-conten...

I'll be presenting a paper on London's only local building stone, ferricrete, at the #Harmondsworth600 meeting in September. One of the oldest secular buildings in London it has a fascinating history. Full info on speakers & subjects + registration is at www.english-heritage.org.uk/visit/whats-...

High over the beautiful Llanddwyn Island on the west coast of Ynys Môn/Anglesey this afternoon during @rcahmwales.bsky.social aerial reconnaissance 🛩️ Few if any cropmarks visible in the north 😥 despite high drought readings - hopefully this will improve into July 🤞 📷 Mobile phone snap

Springfield Park in Hackney is London’s only geological nature reserve. London Clay is capped by Ice Age gravels and post-glacial brickearths. The boundary between them is a spring line drive.google.com/file/d/167gh... #LondonGeology #SpringfieldPark #Hackney #londonparks

As London Action Climate Week begins, it is a timely reminder that the clock is ticking on preparing our river networks for the extreme weather events that are already affecting our communities.🧵⬇️

Understanding how the geology of London influences its topography though London’s views is definitely part of London Geodiversity Partnership’s remit. Do you have a favourite view of London? #LondonGeology #LondonsViews

What an interesting site!

Part of our activities is designing and producing geological information boards and leaflets for London’s geosites. You can download these from our website londongeopartnership.org.uk/informationb...

From Walton-on-the-Naze a few weeks ago. The fossilised skull of and extinct fish. A Halecopsis Insignis, from the London clay, 50-54 million years old.

Leading walks and geotrails to explain London’s geology is one of London Geodiversity Partnerships activities. We organise walks across London for groups with an interest in the geology, Check out the Geotrails link at londongeopartnership.org.uk/geotrails/ #LondonGeology #Geotrails

We are now on Instagram! Follow us there @londongeodiversity #LondonGeology

We are now on Instagram! Follow us there @londongeodiversity #LondonGeology

Here are a couple of photos of our recent geotrail to Croham Hurst near Croydon which took place on 29th May. 📷 @gaildickerson.bsky.social #LondonGeology #CrohamHurst

Some NEW research on our website - Rob Scaife & Mike Hacker's 2025 report on the pollen and geology of Highgate Wood #Haringey is available to download at londongeopartnership.org.uk/wp/wp-conten... #LondonGeology #LondonArchaeology

Some NEW research on our website - Rob Scaife & Mike Hacker's 2025 report on the pollen and geology of Highgate Wood #Haringey is available to download at londongeopartnership.org.uk/wp/wp-conten... #LondonGeology #LondonArchaeology

Twin tunnel boring machines are now advancing beneath homes and roads towards Euston, with HS2 confirming steady progress through London clay. www.ianvisits.co.uk/articles/dee...

Hot weather style goalz. Ten out of ten for nonchalant lounging in a Grecian toga & styling it out with a dinky bracelet #mudlark #ThamesForeshore

#Thames flow here is mid 20s cubic metres/second. On this day in 1671 Thomas Blood attempted to steal the Crown Jewels

My upcoming #urbangeology walks with London Walks are all available in one place at the link below. The next one is a favourite, ‘The Monument, the Moon and Malta’ on Saturday 30 May. You can also reserve a place at www.walks.com/guides/ruth-1/ #geology #buildingstones

This Saturday! #walklondon #urbangeology

Harmondsworth Barn is one of @londongeology.bsky.social’s Sites of Geological Interest (SGI). Read more at this link londongeopartnership.org.uk/wp/wp-conten...

I spent yesterday measuring blocks at the spectacular Harmondsworth Great Barn near Heathrow - a rare example of a secular medieval building in London. Famous for its (mostly original) timbers, stone is an important part of its construction and something I’m currently working on #urbangeology

Last chance approaching… 📸The London Rivers Week Photography Comp 2026 is open for entries. 🪴Showcase London’s rivers: nature, wildlife, and people enjoying blue spaces. 📷 Deadline: 1 May 📷 ow.ly/rJGo50YLhM4

As part of GeoWeek 2026 the London Geodiversity Partnership have organised a geotrail to Croham Hurst, Croydon, in conjunction with John Hines and Eleanor Redshaw of Croydon Natural History and Scientific Society. More info on our website londongeopartnership.org.uk/geotrail-to-... #londongeology

I’ll be giving a public lecture on mineral pigments in art @geolsoc.bsky.social on the evening of 21st July. You can attend in person or watch online. Registration details in the link below www.geolsoc.org.uk/events/miner...

Jasmir Creed studies at @sladeschoolucl.bsky.social and is a fabulous painter of London life. You can follow her on Instagram (Jasmir_Creed_artist)

'Guru's Door' Sri Guru Singh Sabha, Southall (2022) by Jasmir Creed jasmircreed20.wixsite.com/jasmir-creed

My next #urbangeology walk with London Walks will be on 2 May 2026 and will be all about the rocks, minerals and fossils in building stones in the City of London. Reservations and more info is at www.walks.com/our-walks/ge... See you there!

Does your team need to know more about London’s geology? We lead walking tours for organisations to introduce the stratigraphy of London - crucial to urban planning and engineering works. Here we are walking in Waltham Forest with a group of TfL engineers #londongeology

Our member Di Clements will be presenting a virtual walk down the River Westbourne on 21st April at Camden Local Studies Centre. Full info in the poster and alt text below. #londongeology #riverwestbourne @camdencouncil.bsky.social

Public toilets at Maida Hill Market are clad in reclaimed and reused igneous plutonic rocks; red rapakivi granite from Finland and Norwegian larvikite. You can still see the plug marks on several blocks showing the quarrying technique. Cities need public loos! #urbangeology #reuse #reclaim #london

Read London Geodiversity Partnership's new Action Plan londongeopartnership.org.uk/actionplans/

Beneath the street named Walbrook in the City of London is a stream of the same name. It was an important source of water for Roman London but during the medieval period was used as a sewer and had been covered over by the 17th century.

Going on an event? Do post your photos and tell us about it! Clickable links to these, and all OUGS Events at ougs.org/events/ Events are open to all (provided there's space) Go to the Events Diary, click on Event name, that will open a pop up with fuller details, organiser contact etc.

Artist Timothy Yufit’s In Place project uses Layers of London to document displaced headstones embedded within London’s parks and public spaces. These fragmented historical traces remain present within the contemporary urban landscape. www.layersoflondon.org/map/collecti...

More Ice Age London Outreach this Thursday 🦣🏺