Ruth Siddall
@pavementgeology.bsky.social
What is your city built from? This account is all about building stones and accessible geology in the built environment. londonpavementgeology.co.uk
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Ruth Siddall
@pavementgeology.bsky.social
· Nov 14
Hello and welcome to our new followers! 🙌 we are all about the geology of building stones and host the LondonPavementGeology.co.uk website which archives building stone data for the UK. Please check it out, and you can also submit locations near you
Reposted by Ruth Siddall
A late Neolithic dagger found in the pile dwelling site of the Roseninsel, Bavaria.The blade is made of flint from the Monti Lessini, upper Italy.
Dating 3500 - 2700 BC.
On display at Archäologische Staatssammlung München
📷 me
🏺 #archaeology
Dating 3500 - 2700 BC.
On display at Archäologische Staatssammlung München
📷 me
🏺 #archaeology
November 18, 2025 at 5:12 PM
A late Neolithic dagger found in the pile dwelling site of the Roseninsel, Bavaria.The blade is made of flint from the Monti Lessini, upper Italy.
Dating 3500 - 2700 BC.
On display at Archäologische Staatssammlung München
📷 me
🏺 #archaeology
Dating 3500 - 2700 BC.
On display at Archäologische Staatssammlung München
📷 me
🏺 #archaeology
Reposted by Ruth Siddall
健康診断で訪れた神戸新聞松方ホール
沢山の石材や街化石を観察することが出来ます！
①1階の床や柱にはスペイン産ローザジロナが使用されていてウミユリやベレムナイト、腕足類の化石を見ることが出来ました
#街の中で見つかるすごい石
#街角地質学
#街化石
#火曜日は化石の日
沢山の石材や街化石を観察することが出来ます！
①1階の床や柱にはスペイン産ローザジロナが使用されていてウミユリやベレムナイト、腕足類の化石を見ることが出来ました
#街の中で見つかるすごい石
#街角地質学
#街化石
#火曜日は化石の日
November 18, 2025 at 2:37 PM
健康診断で訪れた神戸新聞松方ホール
沢山の石材や街化石を観察することが出来ます！
①1階の床や柱にはスペイン産ローザジロナが使用されていてウミユリやベレムナイト、腕足類の化石を見ることが出来ました
#街の中で見つかるすごい石
#街角地質学
#街化石
#火曜日は化石の日
沢山の石材や街化石を観察することが出来ます！
①1階の床や柱にはスペイン産ローザジロナが使用されていてウミユリやベレムナイト、腕足類の化石を見ることが出来ました
#街の中で見つかるすごい石
#街角地質学
#街化石
#火曜日は化石の日
Reposted by Ruth Siddall
Why are all these chalk boulders on the foreshore of the River Thames? They are derived from barge beds - platforms constructed from chalk blocks onto which barges could beach. You can often see remains of barge beds ie at Battersea #londongeology #urbangeology #Thames
November 16, 2025 at 5:07 PM
Why are all these chalk boulders on the foreshore of the River Thames? They are derived from barge beds - platforms constructed from chalk blocks onto which barges could beach. You can often see remains of barge beds ie at Battersea #londongeology #urbangeology #Thames
Reposted by Ruth Siddall
DYK, that sepia ink was originally made from squid ink?
DYK, that it is possible to recover the remains of ink from fossil Belemnites?
DYK, that Mary Anning discovered this?
DYK, that you can reconstitute that fossil squid ink and use it to draw?
DYK, this was en vogue in the 19th century?
DYK, that it is possible to recover the remains of ink from fossil Belemnites?
DYK, that Mary Anning discovered this?
DYK, that you can reconstitute that fossil squid ink and use it to draw?
DYK, this was en vogue in the 19th century?
The Geological Society
- Fossil sepia, described 1829
Discover and access geoscience information resources via one of the world’s premier Earth science libraries. Search our collection of printed books, maps and journals, e-journals, internet resources, ...
www.geolsoc.org.uk
November 16, 2025 at 10:01 AM
DYK, that sepia ink was originally made from squid ink?
DYK, that it is possible to recover the remains of ink from fossil Belemnites?
DYK, that Mary Anning discovered this?
DYK, that you can reconstitute that fossil squid ink and use it to draw?
DYK, this was en vogue in the 19th century?
DYK, that it is possible to recover the remains of ink from fossil Belemnites?
DYK, that Mary Anning discovered this?
DYK, that you can reconstitute that fossil squid ink and use it to draw?
DYK, this was en vogue in the 19th century?
Reposted by Ruth Siddall
November 14, 2025 at 4:13 PM
Reposted by Ruth Siddall
A wet day out to look at the Pulhamite outcrops in Battersea Park. These are man made ‘outcrops’ constructed in the 1870s #urbangeology #londongeology
November 14, 2025 at 5:51 PM
A wet day out to look at the Pulhamite outcrops in Battersea Park. These are man made ‘outcrops’ constructed in the 1870s #urbangeology #londongeology
Reposted by Ruth Siddall
A few photos of how history pops through the slickness of the now. This is a corner in the Museumincel area. The Red Army advanced through here towards the civic district of Berlin in 1945. There’s quite a few bullet impacts still in evidence including some quite large calibre.
November 13, 2025 at 10:00 PM
A few photos of how history pops through the slickness of the now. This is a corner in the Museumincel area. The Red Army advanced through here towards the civic district of Berlin in 1945. There’s quite a few bullet impacts still in evidence including some quite large calibre.
Golden Jaisalmer Limestone in NW London at the Shri Sanatan Mandir londongeopartnership.org.uk/wp/wp-conten... #urbangeology #london
November 13, 2025 at 10:48 AM
Golden Jaisalmer Limestone in NW London at the Shri Sanatan Mandir londongeopartnership.org.uk/wp/wp-conten... #urbangeology #london
Reposted by Ruth Siddall
Artists! Is your studio haunted by the bowels if a stallion? A short news item from a 1930s edition of the magazine ‘The Artist’ #ghosts
November 10, 2025 at 2:33 PM
Artists! Is your studio haunted by the bowels if a stallion? A short news item from a 1930s edition of the magazine ‘The Artist’ #ghosts
Reposted by Ruth Siddall
Furiously finalising my campaign so I can press "launch". One last chance to sign up for first dibs (the limited rewards are very limited); the next reminder will be once the campaign is already live!
Is there anyone on Bsky who remembers this book? It's been out of print for a while, because it needs revising in the light of 5 more years of research & experience (including a proper translation of Umdat ul-Kuttab). Being unpaid work, I've simply not been able to prioritise this, so I've decided…
November 10, 2025 at 12:27 PM
Furiously finalising my campaign so I can press "launch". One last chance to sign up for first dibs (the limited rewards are very limited); the next reminder will be once the campaign is already live!
Artists! Is your studio haunted by the bowels if a stallion? A short news item from a 1930s edition of the magazine ‘The Artist’ #ghosts
November 10, 2025 at 2:33 PM
Artists! Is your studio haunted by the bowels if a stallion? A short news item from a 1930s edition of the magazine ‘The Artist’ #ghosts
Correct link ruthsiddall.co.uk/Walks/WarMem...
November 9, 2025 at 2:44 PM
Correct link ruthsiddall.co.uk/Walks/WarMem...
🧵The stone used for war memorials is often chosen carefully and can represent either the home land of the troops or the theatre of war itself. Read more about geology and stone in London’s War Memorials at ruthsiddall.co.uk/Walks/WarMem... #remembrancesunday #urbangeology
November 9, 2025 at 11:20 AM
🧵The stone used for war memorials is often chosen carefully and can represent either the home land of the troops or the theatre of war itself. Read more about geology and stone in London’s War Memorials at ruthsiddall.co.uk/Walks/WarMem... #remembrancesunday #urbangeology
Aercap House on St Stephen’s Green, clad in Kilkenny limestone, Portland roach and Wicklow granite #urbangeology #dublin
November 8, 2025 at 3:06 PM
Aercap House on St Stephen’s Green, clad in Kilkenny limestone, Portland roach and Wicklow granite #urbangeology #dublin
Panels of Irish ‘Marble’ in the foyer of what is now the Department of Justice in Dublin. Stunning example of #urbangeology
November 7, 2025 at 5:46 PM
Panels of Irish ‘Marble’ in the foyer of what is now the Department of Justice in Dublin. Stunning example of #urbangeology
Reposted by Ruth Siddall
These dark patches on the limestone are ancient animal (shrimp-like creatures, we think!) burrows, made when this was a muddy sea floor. It is believed that a storm washed the the animals from these burrows and filled them in with gravel or sand (in this case Crinoid segments).
November 7, 2025 at 10:33 AM
These dark patches on the limestone are ancient animal (shrimp-like creatures, we think!) burrows, made when this was a muddy sea floor. It is believed that a storm washed the the animals from these burrows and filled them in with gravel or sand (in this case Crinoid segments).
Reposted by Ruth Siddall
Well, that was unsettling 😳
Have a read (link in post below)!
Have a read (link in post below)!
I've TWO of these beautiful 'Witch & Hare' original linocuts by my mum, Jo, to give away to my Bluesky followers. The print is from my recently republished book, Help The Witch.
All you have to do to enter is repost this story from the book (maybe give it a read too?) www.tom-cox.com/robot-2/
All you have to do to enter is repost this story from the book (maybe give it a read too?) www.tom-cox.com/robot-2/
November 7, 2025 at 10:17 AM
Well, that was unsettling 😳
Have a read (link in post below)!
Have a read (link in post below)!
Reposted by Ruth Siddall
'Professor Sally Foster, of the University of Stirling’s Faculty of Arts and Humanities, has now discovered the existence of this body of fragments, only one of which was officially recognised when she began her research.'
New Stone of Destiny fragments uncovered by Stirling University expert
NEW research led by Stirling University has revealed the existence and fate of many fragments of the Stone of Destiny, including those secreted away…
www.thenational.scot
November 7, 2025 at 8:47 AM
'Professor Sally Foster, of the University of Stirling’s Faculty of Arts and Humanities, has now discovered the existence of this body of fragments, only one of which was officially recognised when she began her research.'
This is true - I know this practice relates to indigenous ‘sky cultures’ which I don’t object to but it seems they are really only US relevant names with little recognition of other cultures. Do correct me if I’m wrong!
Have we always known the names of the full moons - outside of the harvest moon? I feel it’s just been the last couple of years the names have really been pushed.
November 5, 2025 at 6:35 PM
This is true - I know this practice relates to indigenous ‘sky cultures’ which I don’t object to but it seems they are really only US relevant names with little recognition of other cultures. Do correct me if I’m wrong!
Ty Hyll, Capel Curig, Wales. Built out of large rough blocks of the local rhyolitic volcanic rocks. Little is known of its history, the local myth is that the house was built in a day. Not sure I buy that as an excuse for not reducing block size, nevertheless an intriguing building #urbangeology
November 2, 2025 at 6:39 PM
Ty Hyll, Capel Curig, Wales. Built out of large rough blocks of the local rhyolitic volcanic rocks. Little is known of its history, the local myth is that the house was built in a day. Not sure I buy that as an excuse for not reducing block size, nevertheless an intriguing building #urbangeology
A major day in history and one that affected my family who lived in Dolgarrog. My Taid (grandad) helped with the rescue #OTD #100yearsagotoday #centenary #dolgarrogdamdisaster
Today marks the #Centenary of the #Dolgarrog Dam #Disaster The village never forgot and UK #Reservoir Saftey Laws were changed because of it Read what our colleague Dr Lynda Yorke wrote about this event & how it shaped the community theconversation.com/when-the-dam...
When the dam broke: the 1925 disaster that reshaped a Welsh community and a country’s safety laws
A century after a dam burst in Dolgarrog, killing 16 people, the Welsh village still lives with the legacy that reshaped UK safety laws and its own identity.
theconversation.com
November 2, 2025 at 10:44 AM
A major day in history and one that affected my family who lived in Dolgarrog. My Taid (grandad) helped with the rescue #OTD #100yearsagotoday #centenary #dolgarrogdamdisaster
Reposted by Ruth Siddall
Today marks the #Centenary of the #Dolgarrog Dam #Disaster The village never forgot and UK #Reservoir Saftey Laws were changed because of it Read what our colleague Dr Lynda Yorke wrote about this event & how it shaped the community theconversation.com/when-the-dam...
When the dam broke: the 1925 disaster that reshaped a Welsh community and a country’s safety laws
A century after a dam burst in Dolgarrog, killing 16 people, the Welsh village still lives with the legacy that reshaped UK safety laws and its own identity.
theconversation.com
November 2, 2025 at 8:16 AM
Today marks the #Centenary of the #Dolgarrog Dam #Disaster The village never forgot and UK #Reservoir Saftey Laws were changed because of it Read what our colleague Dr Lynda Yorke wrote about this event & how it shaped the community theconversation.com/when-the-dam...
Reposted by Ruth Siddall
We had great fun on our whistle stop tour of London all those years ago, and I love the idea of the cultural infrastructure pf a place being imprinted by the history of the rocks below (or sometimes borrowed!).
October 31, 2025 at 1:14 PM
We had great fun on our whistle stop tour of London all those years ago, and I love the idea of the cultural infrastructure pf a place being imprinted by the history of the rocks below (or sometimes borrowed!).
Reposted by Ruth Siddall
For 61 years the #BBCWorldService has been broadcasting the latest in science via its weekly Science in Action programme. That dies in the next half hour, with this final edition, reflecting on the fall in trust in expertise driven by malign interests over recent years.
October 30, 2025 at 8:20 PM
For 61 years the #BBCWorldService has been broadcasting the latest in science via its weekly Science in Action programme. That dies in the next half hour, with this final edition, reflecting on the fall in trust in expertise driven by malign interests over recent years.
Why we should be building in stone
- Stone: The ancient material making a comeback www.bbc.com/news/article...
- Stone: The ancient material making a comeback www.bbc.com/news/article...
Set in stone: The old building technique makes a comeback
Could stone be the environmentally friendly way forward in the construction industry?
www.bbc.com
October 29, 2025 at 9:08 AM
Why we should be building in stone
- Stone: The ancient material making a comeback www.bbc.com/news/article...
- Stone: The ancient material making a comeback www.bbc.com/news/article...