2 0 2 5 - E V E N T S L I S T HARROW ROCK SHOW! from 16 Sept Field Trips Monthly Lectures on Zoom Public 'Earth Discovery' Meetings ROCK SHOW ONLINE! Local Geology Stanmore Gravel Project Chalk Connections UK Geology by region About HHGS HHGS on YouTube Maurer's Tectonics JOIN US! HHGS Facebook Page Geology Links and Local Groups
2026 Lectures
Jan 14 - Volcanoes and magmatic processes (working title) by Prof Nick Petford (Durham University)
Feb 11 – Lecture:
Phanerozoic orbital-scale glacio-eustatic variability, by Dr Douwe van der Meer (Harrow & Hillingdon Geological Society)
Mar 11 -
Mine Water Heat, by Dr Rebecca Chambers (Mine Remediation Authority)
Geology and Life series
In preparation
May 13 – AGM
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link
Newsletters 50th Anniversary Celebrations (2023)
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:
click for 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.

~ HARROW ROCK SHOW! ~
Visit now during museum open hours!
Go to Headstone Manor Museum for our biggest event of the year! Introducing geology to local people of all ages, accessible and free to visit - bring your friends for a day of rocks in this stunning location.
Our exhibition focuses on rock deposits under Harrow (and their use in industry), fossils from the time of the dinosaurs, and local rivers and landscapes, with new displays on the Geology of Harrow, brickmaking, sarsens and puddingstone.
2025 LECTURE PROGRAMME
~ MEETINGS ~
Wednesday December 10th Monthly Meeting
Online Lecture via Zoom
Title: “Campi Flegrei: Living on a resless volcano
Speaker: Prof Christopher Kilburn (Director, UCL Hazard Centre, University College London)
To attend as a visitor, please email: contact@hhgs.org.uk
Regular visitors will be asked to become members.
Lecture Details
~ FIELD TRIPS ~
Field Trips
Sat 18 October :
Trip to the Oxford University Museum of Natural Historyto see its temporary exhibition of fossils found during HS2 construction:
"From 'Flying Steed' to High Speed"

Sat 6 Sept:
Our visit to St Mary's Church, Bedfont went extremely well. The church is amazing and we got a warm welcome at their coffee morning. Then in Hounslow we saw perhaps the best sarsen boulder in London. The two sites built our understanding of local cemented sandstones.

Our August trip to
Sedgwick Museum, Cambridge was very well attended and greatly enjoyed. Director Liz Hide gave fantastic insight into the history of building stones and led us on a private showing of the John Watson Collection: John Watson Collection and the Museum
Field Trip Programme 2025
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.
NEW Virtual Tour! Building Stones of Harrow Virtual Building Stones Tour of Uxbridge Building Stones in Pinner Geotrail Virtual Building Stones Tour of Pinner
~ ~ ~ ~ ~
~ 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 continues at Headstone Manor until 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.

~ GEOCONSERVATION ~
Harefield Great Pit SSSI
Together with the London Geodiversity Partnership, in March we carried out important mainenance of this local Site of Special Scientific Interest for Geology. Both the Chalk / Upnor unconformity and the Lambeth Group sands/gravel were cleared of overgrown vegetation, and access paths were re-established.

~ ~ ~ ~ ~
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.
Maurer paper, Okayama University
~ ~ ~ ~ ~
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

2025 Lectures
Jan 08 – Lecture: Jurassic Vampire Squid and 3D X-ray imaging of fossils (working title) by Prof Ru Smith (University of Malaya).
Feb 12 – Lecture: The Wonders of Sedimentology, by Prof Jon Noad, (University of Adelaide)
Volcanoes series
March 12 – Living with a Volcano, by Dr Blaise Mafuko, (University of Goma, Republic of Congo).
Apr 09 – Lecture by Liz Gaunt (Experimental Volcanology Lab, UCL)
May 14 – AGM followed by Lecture: Research from the Stanmore Gravel Project by Prof David Bridgland (Durham University)
June 11 – Lecture: Volcanoes and Climate Change by Prof Siwan Davies (University of Swansea)
July 09 - Lecture: Walks through Geological Time, by Michael Heap (Chairman, CED Stone)
Sept 10 – Lecture: Natural Hydrogen in Earth's crust and upper mantle, by Dr Kevin Wong (University of Cambridge)
Oct 08 - Lecture: Risky Mountains in Paradise: Montserrat and Caribbean volcanoes, by Prof Richard Robertson (University of the West Indies Seismic Research Centre)
Nov 12 - Lecture: Past environments of the Isle of Wight, by Eve Horsfall, (Portsmouth University)
Dec 10 -
Lecture: “Campi Flegrei: living on a restless volcano" by Prof Christopher Kilburn (University College London)
Lectures are held on Zoom at 8pm on the 2nd Wednesday of the month. email contact@hhgs.org.uk to request link

Newsletters
Golden Anniversary Newsletter Jan 2023 May 2023 Newsletter
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Autumn 2022 Newsletter
Formed in 1973, the Society's aim is to advance public appreciation of geology by observation, discussion, field studies, research, illustrated talks and exhibitions. Memberships embraces all age groups from 16 years upwards, regardless of gender or race, and includes those with widely diversified interests. We have a lively program of meetings held on the second Wednesday of each month. Exhibitions at locations throughout the London Boroughs of Harrow and Hillingdon, and elsewhere, give members an opportunity to display aspects of their particular interests and their collections. We also have a good field trip programme to suit all tastes.