Field Trips
Monthly Lectures on Zoom
Public 'Earth Discovery' Meetings
About HHGS
Stanmore Gravel Project
ROCK SHOW ONLINE!
Maurer's Tectonics
UK Geology by region
Local Geology
Chalk Connections
JOIN US!
HHGS on YouTube
HHGS Facebook Page
Geology Links and Local Groups
Newsletters
2 0 2 5 - E V E N T S L I S T
50th Anniversary Celebrations (2023)
2026 Lecture Programme
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link
Jan 14 – Volcanic Britain: When, Where & How, by Prof Nick Petford (Durham University)
Feb 11 – A billion years of sea level change due to changes in plate tectonics and ice caps, by Dr Douwe van der Meer (HHGS)
March 11 – Mine Water Heat, by Dr Rebecca Chambers (Mine Remediation Authority)
April 08 – Thames through time - Cornish Flavour, by Ian Mercer (GeoEssex)
May 13 – AGM followed by our review of the past 12 months
Geology and Life Lecture Series for 2026
June 10 – Lecture:
July 08 – Lecture:
September 09
October 14: Megalosaurus and the Dinsaur Highway, by Dr Emma Nicholls (Oxford University Museum of Natural History)
November 11
December 09
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link
Jan 14 – Volcanic Britain: When, Where & How, by Prof Nick Petford (Durham University)
Feb 11 – A billion years of sea level change due to changes in plate tectonics and ice caps, by Dr Douwe van der Meer (HHGS)
March 11 – Mine Water Heat, by Dr Rebecca Chambers (Mine Remediation Authority)
April 08 – Thames through time - Cornish Flavour, by Ian Mercer (GeoEssex)
May 13 – AGM followed by our review of the past 12 months
Geology and Life Lecture Series for 2026
June 10 – Lecture:
July 08 – Lecture:
September 09
October 14: Megalosaurus and the Dinsaur Highway, by Dr Emma Nicholls (Oxford University Museum of Natural History)
November 11
December 09
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link
Uxbridge Rock Show ---> Harrow Rock Show
Due to the relocation of Uxbridge Library to smaller premises, the 2025 Harrow Rock Show is being held at Headstone Manor Museum from September. And don't forget about our Rock Show Online:
Due to the relocation of Uxbridge Library to smaller premises, the 2025 Harrow Rock Show is being held at Headstone Manor Museum from September. And don't forget about our Rock Show Online:
Look out for news of HHGS in Earth Heritage Magazine, summer and winter editions. Subscribe free of charge to receive notification of publication.
~ MEETINGS ~
Wednesday February 11th Monthly Meeting
Online Lecture via Zoom
Title: “A billion years of sea level change due to changes in plate tectonics and ice caps”
Speaker: Dr Douwe van der Meer (Harrow & Hillingdon Geological Society)
To attend as a visitor, please email: contact@hhgs.org.uk
Regular visitors will be asked to become members.
Online Lecture via Zoom
Title: “A billion years of sea level change due to changes in plate tectonics and ice caps”
Speaker: Dr Douwe van der Meer (Harrow & Hillingdon Geological Society)
To attend as a visitor, please email: contact@hhgs.org.uk
Regular visitors will be asked to become members.
~ FIELD TRIPS ~
2026 Dates for your diary
Local trips and building stone walks are being planned on Saturdays. Please reserve the following dates:
March 21 ~ April 18 ~ May 16
June 13 ~ July 11 ~ August 8
September 5 ~ October 10 ~ November 14
In June 2025 we visited Suffolk to look at gravel deposits which provide context to help us understand our local Stanmore Gravel.
Local trips and building stone walks are being planned on Saturdays. Please reserve the following dates:
March 21 ~ April 18 ~ May 16
June 13 ~ July 11 ~ August 8
September 5 ~ October 10 ~ November 14
In June 2025 we visited Suffolk to look at gravel deposits which provide context to help us understand our local Stanmore Gravel.
Another highlight of our Field Trip programme last year was a private viewing of the John Watson Collection at the Sedgwick Museum, Cambridge by Director Liz Hide. Link to John Watson Collection and the Museum
Field Trip Programme
NEW Virtual Building Stones Walk in Central Harrow!
You may remember our series of local Geological Trails from 20 years ago, available as printed brochures from libraries in Harrow and Hillingdon. These are now being updated as Virtual Tours by our Field Secretary, Allan Wheeler, in full colour and high resolution pdf format. Slimmed-down printed leaflets are also being produced for handing out at events and through local libraries.
You may remember our series of local Geological Trails from 20 years ago, available as printed brochures from libraries in Harrow and Hillingdon. These are now being updated as Virtual Tours by our Field Secretary, Allan Wheeler, in full colour and high resolution pdf format. Slimmed-down printed leaflets are also being produced for handing out at events and through local libraries.
~ ~ ~ ~ ~
~ GEOCONSERVATION ~
Harefield Great Pit SSSI
Harefield Great Pit SSSI
Together with the London Geodiversity Partnership, we carry out important mainenance of this local Site of Special Scientific Interest for Geology. Both the Chalk / Upnor unconformity and the Lambeth Group sands/gravel need to be cleared of overgrown vegetation, and access paths checked. We aim to hold our annual geo-conservation day at Harefield Great Pit in March 2026.
~ ~ ~ ~ ~
~ HEADSTONE MANOR EVENTS ~
~ HEADSTONE MANOR EVENTS ~
2025 heralded a new collaboration for us with several events at Harrow's local manor house museum.
Tuesday 22 April - Tuesday Talk on "The Pebbles on Harrow Weald Common" was given by Liz Chiu to a full room of enthusiastic locals. This was supported by a Chalk and Flint Discovery Session in the morning.
Monday 15 September - Harrow Rock Show was opened by 4 Harrow Councillors including the Mayor of Harrow, Cllr Anjana Patel. Harrow Rock Show continued at Headstone Manor through to Christmas.
Tuesday 25 November - The Tuesday Talk on "Rocks and Minerals in the History of Harrow" was given by Liz Chiu, in conjuction with a Rocks and Minerals Discovery Session the same morning. Both were held in The Granary, Headstone Manor.
Tuesday 22 April - Tuesday Talk on "The Pebbles on Harrow Weald Common" was given by Liz Chiu to a full room of enthusiastic locals. This was supported by a Chalk and Flint Discovery Session in the morning.
Monday 15 September - Harrow Rock Show was opened by 4 Harrow Councillors including the Mayor of Harrow, Cllr Anjana Patel. Harrow Rock Show continued at Headstone Manor through to Christmas.
Tuesday 25 November - The Tuesday Talk on "Rocks and Minerals in the History of Harrow" was given by Liz Chiu, in conjuction with a Rocks and Minerals Discovery Session the same morning. Both were held in The Granary, Headstone Manor.
~ ~ ~ ~ ~
ROBERT "Bob" MAURER
An Obituary has been published by the Geological Society of London in the Autumn edition of Geoscientist Magazine. See Bob's Obituary online here.
Click for details of Bob's life and work.
An Obituary has been published by the Geological Society of London in the Autumn edition of Geoscientist Magazine. See Bob's Obituary online here.
Click for details of Bob's life and work.
~ ~ ~ ~ ~
STANMORE GRAVEL PROJECT
We have exposed a section of gravel on Harrow Weald Common which is currently open, so do go and take a look. The 258 bus stops nearby and it's a wonderful location for its view over London and woodland walks. See the Project page for more details
We have exposed a section of gravel on Harrow Weald Common which is currently open, so do go and take a look. The 258 bus stops nearby and it's a wonderful location for its view over London and woodland walks. See the Project page for more details
