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X-ORIGINAL-URL:https://www.hertsgeolsoc.org.uk
X-WR-CALDESC:Events for Hertfordshire Geological Society
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TZID:UTC
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TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20240101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20250313T193000
DTEND;TZID=UTC:20250313T210000
DTSTAMP:20260404T110111
CREATED:20241203T113718Z
LAST-MODIFIED:20241203T113718Z
UID:12529-1741894200-1741899600@www.hertsgeolsoc.org.uk
SUMMARY:AGM & Launch of the Hertfordshire 50th anniversary book 
DESCRIPTION:Annual General Meeting  followed by refreshments & The Launch of the Hertfordshire 50th anniversary book
URL:https://www.hertsgeolsoc.org.uk/event/agm-launch-of-the-hertfordshire-50th-anniversary-book/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250410T194500
DTEND;TZID=UTC:20250410T213000
DTSTAMP:20260404T110111
CREATED:20241203T114147Z
LAST-MODIFIED:20250412T112954Z
UID:12536-1744314300-1744320600@www.hertsgeolsoc.org.uk
SUMMARY:Epping Forest through geological time
DESCRIPTION:48th Percy Evans Lecture given by Mike Lambert\, HGS Honorary President \nAs a child\, Epping Forest was my playground\, where I climbed trees\, made dams and rode my bike. But there was one way in which it disappointed me. When I began collecting fossils and minerals and taking an interest in Geology\, it seemed to have nothing to offer. Real Geology\, so it seemed to me\, only existed in places like Lyme Regis and Scotland. \nThis talk is my attempt to set the record straight and appreciate the many wonders that exist in and under Epping Forest. After describing the Epping Forest Ridge in its regional context\, I’ll work my way up a stratigraphic column\, from the oldest rocks of the Palaeozoic basement to the youngest superficial deposits. Along the way\, we’ll examine discoveries made from roadworks in the 1970s\, see how Anglian ice turned rivers back-to-front and visit a Neanderthal hunting and butchery site. \nView this talk in the Members’ Section.
URL:https://www.hertsgeolsoc.org.uk/event/is-epping-forest-a-nunatak/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2025/03/EppingForrest-kc11777_xgaplus.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250508T194500
DTEND;TZID=UTC:20250508T213000
DTSTAMP:20260404T110111
CREATED:20241203T115254Z
LAST-MODIFIED:20250520T084433Z
UID:12538-1746733500-1746739800@www.hertsgeolsoc.org.uk
SUMMARY:Sea Level Change in the Anthropocene
DESCRIPTION:Talk by Dr. Colin Summerhayes\, Emeritus Associate\, Scott Polar Research Institute\, University of Cambridge \nAbstract:\nGiven the magnitude and rapid rise of greenhouses gases(including water vapour)\, their long lifetime in the atmosphere\, and the present disequilibrium in Earth’s energy budget (expressed as the Earth’s Energy Imbalance\, or EEI)\, both temperatures and sea level must continue to rise – even with carbon emissions lowered to net zero (where anthropogenic CO2 emissions = anthropogenic CO2 removals) – until the energy budget balance is eventually restored. Due to the natural lags between temperature rise\, ice melt\, and sea level rise\, it will take a few centuries for this equilibrium point to be reached. There is a high probability that sea level rise will reach at least 1m (range 0.9-1.8m) above 1900 levels by 2100. During past warmer-than-present interglacials\, sea level commonly reached between 4-9m above 1900 levels and occasionally between 12-15m above (much as in the warm periods of the mid-Miocene and mid-Pliocene). \nUnfortunately due to technical problems this talk was not recorded.
URL:https://www.hertsgeolsoc.org.uk/event/sea-level-change-in-the-anthropocene/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250612T193000
DTEND;TZID=UTC:20250612T213000
DTSTAMP:20260404T110111
CREATED:20241203T115438Z
LAST-MODIFIED:20250520T084656Z
UID:12540-1749756600-1749763800@www.hertsgeolsoc.org.uk
SUMMARY:Adventures of an Argon geochronologist: Why do we date rocks?
DESCRIPTION:Talk Dr Sarah Sherlock\, Senior Research Fellow\, The Open University \nAbstract:\nMy current preoccupation is to find new ways in which we can increase the spatial resolution of Ar/Ar laserprobe dating to extract new information from rocks and minerals. Through this I\, and colleagues\, are investigating the diffusion mechanisms of argon in feldspars\, understanding the behaviour of argon during friction melting\, the uptake of excess argon in mudrocks and their attendant strain-fringes\, the timing of fluid-rock interaction through dating authigenic alkali feldspars\, dating meteorite impact craters\, the behaviour of argon in volcanic glasses\, and most recently in basalts. Recent work in Turkey provides examples of the use of Ar39/Ar40 dating techniques and how they can be used in the geological interpretation of regional igneous and tectonic provinces.
URL:https://www.hertsgeolsoc.org.uk/event/adventures-of-an-argon-geochronologist-why-do-we-date-rocks/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250704T090000
DTEND;TZID=UTC:20250704T160000
DTSTAMP:20260404T110111
CREATED:20250628T095502Z
LAST-MODIFIED:20250628T095710Z
UID:13222-1751619600-1751644800@www.hertsgeolsoc.org.uk
SUMMARY:Summer Event - Water Table III Understanding Our Aquifer
DESCRIPTION:
URL:https://www.hertsgeolsoc.org.uk/event/summer-event-water-table-iii/
LOCATION:Cambridge Geological Society\, Babbage Lecuture Theatre\, new Museums Site\, Pembroke Street\, Cambridge\, CB2 3QZ\, United Kingdom
CATEGORIES:Conference
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2025/06/Water-Table-III-programme-2.1.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250710T194500
DTEND;TZID=UTC:20250710T213000
DTSTAMP:20260404T110111
CREATED:20241203T115639Z
LAST-MODIFIED:20250626T152309Z
UID:12542-1752176700-1752183000@www.hertsgeolsoc.org.uk
SUMMARY:Thames Through Time - with a Cornish flavour
DESCRIPTION:Talk by Ian Mercer from the Essex Rock & Mineral Society. \nAbstract: \nIan Mercer reveals the story of the Thames across Essex by digging into the landscape in and around the county. The Thames has changed course dramatically and repeatedly throughout the past two million years of the current ice age. The greatest impact of the Thames upon the landscape is during times of cold\, when Spring thaws create mighty torrents of water. River-bed gravels have been deposited while the land has been tilting gradually throughout this time\, resulting in ‘staircases’ of gravel terraces across the landscape and beneath the temporary flood of the North Sea. \nDuring this time\, the rivers have brought rocks from across the area of southern Britain as evidence of their journeys. These include beautiful black-and-white pneumatolytic quartz-tourmalinite from around the granite intrusions of the South-West. Ian has collected many of these from across Essex and East Anglia and has grown to love them. He reveals their evidence in the land and in church walls. The Thames will change again many times as climate continues to oscillate.
URL:https://www.hertsgeolsoc.org.uk/event/subsurface-water-flow-through-hertfordshire-tbc/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20250719
DTEND;VALUE=DATE:20250720
DTSTAMP:20260404T110111
CREATED:20241203T120210Z
LAST-MODIFIED:20241203T120210Z
UID:12544-1752883200-1752969599@www.hertsgeolsoc.org.uk
SUMMARY:Golden Anniversary Dinner
DESCRIPTION:Details to follow nearer the time
URL:https://www.hertsgeolsoc.org.uk/event/golden-anniversary-dinner/
LOCATION:The Wellington\, 1 High Street\, Welwyn\, Hertfordshire\, AL6 9LZ\, United Kingdom
CATEGORIES:Celebration
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250911T194500
DTEND;TZID=UTC:20250911T213000
DTSTAMP:20260404T110111
CREATED:20241203T120430Z
LAST-MODIFIED:20250820T111812Z
UID:12549-1757619900-1757626200@www.hertsgeolsoc.org.uk
SUMMARY:Update on Icelandic volcanism
DESCRIPTION:Talk by Emeritus Professor Hazel Rymer\, The Open University \nAbstract\nVolcanism on Iceland is both a source of geothermal & tourism revenue but also a hazard. Geophysical data can be used to explore the origin of the island of Iceland\, the ongoing volcanic activity and to predict its future. Here we’ll look at the latest news and measurements from the land of ice and fire.
URL:https://www.hertsgeolsoc.org.uk/event/icelandic-volcanoes-title-tbc/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
ATTACH;FMTTYPE=image/png:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2024/12/Screenshot-2025-08-20-at-12.15.48.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20250924T160000
DTEND;TZID=UTC:20250928T120000
DTSTAMP:20260404T110111
CREATED:20250520T092538Z
LAST-MODIFIED:20251003T104057Z
UID:13065-1758729600-1759060800@www.hertsgeolsoc.org.uk
SUMMARY:HGS Field Trip Excursion to the Isle of Wight
DESCRIPTION:Numbers and arrangements now finalised for this excursion.\n\nWednesday 24 September arrive on island\nEmbark from Southampton @ 1 pm on Red Funnel Ferries arriving East Cowes 2 pm. Please check in at least 30 mins prior to sailing.\n3 pm check-in at Wight Hotel\, Sandown PO36 8BN \nEvening meal at hotel where we will be joined by our field trip leader Andy Gale. \nThursday 25 September Day 1\nSandown to Whitecliff Bay\, seeing almost the whole stratigraphy exposed. \nMorning:  Sandown to Culver\, along the sandy beach (Wealden-Chalk groups).\nLunch: Culver Haven pub.\nAfternoon: Whitecliff Bay\, Chalk to Bembridge Limestone\, the whole Paleogene succession. This traverse illustrates much of the Cretaceous-Paleogene geological history of southern England (GA Guide Chapters 2 pg 27 & Chapter 3 pg 33). \nFriday 26 September Day 2\nSouthwest Wight (high tide 14:11) \nMorning: Wealden dinosaur habitat at Brook Chine and Chilton Chine. Dinosaur footprints at Hanover Point.\nLunch: Wight Mouse pub\nAfternoon: Compton Bay for Wealden\, Lower Greensand and Chalk groups (GA Guide Chapters 11 pg 56 & Chapter 12 pg 59). \nSaturday 27 September Day 3\nNorthwest Wight \nAlum Bay\, the Needles\, Chalk\, through to Headon Hill Formation.\nLunch in Red Lion\, Freshwater\nAfternoon\, Solent Group (Eocene sands and clays\, very fossiliferous) in Thorness Bay. \nMost of the beach going is pretty easy\, sand/shingle. Although tides are not ideal they are manageable. However if there is an onshore wind\, we may have to modify the afternoon itineraries (GA Guide Chapter 9 pg 50). \nEvening meal at hotel where we will be joined by our field trip leader Andy Gale. \nSunday 28 September depart island\nHotel check-out by 10 am (high tide 15:30)\nDepart from East Cowes @ 2:30 pm on Red Funnel Ferries arriving Southampton 3:30 pm.
URL:https://www.hertsgeolsoc.org.uk/event/hgs-field-trip-excursion-to-the-isle-of-wight/
LOCATION:Wight Hotel\, 11 Avenue Road\, Sandown\, Isle of Wight\, PO36 8BN\, United Kingdom
CATEGORIES:Field Trips
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2025/05/IoW-Wealdon-Chalk-groups-scaled.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251009T194500
DTEND;TZID=UTC:20251009T213000
DTSTAMP:20260404T110111
CREATED:20241203T120821Z
LAST-MODIFIED:20251116T173728Z
UID:12557-1760039100-1760045400@www.hertsgeolsoc.org.uk
SUMMARY:Angiosperms: pollen\, evolution and ecosystems
DESCRIPTION:Talk by Dr Luke Mander\, Senior Lecturer\, The Open University \nAbstract \nLuke’s works with both living plants and material from the plant fossil record\, which represents a vast archive of morphological novelties and natural design solutions that have been produced over the course of evolutionary time. In this context\, he is particularly interested in the evolution of tropical rainforests\, which are among the most complex ecosytems on Earth. He has worked mostly with pollen grains\, which are morphologically fascinating objects with an outstanding fossil record\, but also work with the leaves of vascular plants. \nHis current research activities are focused on plant palaeobiology and morphology. \nHe is interested in quantifying the morphology of plants\, classifying plants on thebasis of their morphological characteristics\, and investigating the biogeographical evolution of plant diversity. \nBiography \nLuke received a PhD in 2010 from University College Dublin for a thesis that investigated 200 million-year-old fossil plant remains in East Greenland. He then spent two years as a postdoc in the Department of Plant Biology at the University of Illinois\, Urbana-Champaign. I returned to the UK with a two-year EU Marie Curie fellowship in the Earth System Science group at the University of Exeter. He has been a lecturer at The Open University since 2015. \nView This Talk In The Members’ Section.
URL:https://www.hertsgeolsoc.org.uk/event/fossil-pollen-from-flowering-plants-and-tropical-rainforests/
LOCATION:Oaklands College\, Sapsed Room (SR)\, Oaklands College\, St Albans\, Hertfordshire\, AL4 0XS\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251113T193000
DTEND;TZID=UTC:20251113T210000
DTSTAMP:20260404T110111
CREATED:20241203T121000Z
LAST-MODIFIED:20251116T173658Z
UID:12559-1763062200-1763067600@www.hertsgeolsoc.org.uk
SUMMARY:The Onset of Modern-Style Plate Tectonic
DESCRIPTION:Talk by Professor Craig Storey\, University of Portsmouth \nAbstract\nSince the 1960s we have accepted the plate tectonic paradigm as being central to how our planet operates at the present day. However\, there is much ongoing debate as to when plate tectonics began and how similar it was to the current observable mode. Hypotheses range from the Hadean to the Neoproterozoic and therefore span across profound changes in the Earth system\, including atmospheric oxygenation and the proliferation of life. In this talk I will review (some of) the “hallmarks” of plate tectonics\, their first appearance and secular evolution\, and speculate on when it all began and how it evolved. \nView This Talk In The Members’ Section.
URL:https://www.hertsgeolsoc.org.uk/event/the-onset-of-modern-style-plate-tectonic/
LOCATION:Zoom Talk
CATEGORIES:Talks
ATTACH;FMTTYPE=image/png:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2024/12/image002.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20251211T193000
DTEND;TZID=UTC:20251211T210000
DTSTAMP:20260404T110111
CREATED:20241203T121136Z
LAST-MODIFIED:20260108T134436Z
UID:12563-1765481400-1765486800@www.hertsgeolsoc.org.uk
SUMMARY:The value & potential of the UK’s dinosaur track sites
DESCRIPTION:Talk by Richard Butler\, Professor of Palaeobiology\, School of Geography\, Earth and Environmental Sciences\, University of Birmingham \nDue to unforeseen circumstances Richard was unable to give this talk so it will be rescheduled to a future date. \nAbstract:\nDinosaur tracks provide important data on the distribution of dinosaurs through time and space and unique information on palaeobiology and behaviour\, such as dinosaur locomotion\, herding behaviour and species interactions. Dinosaur tracks and trackways are typically not collected and generally are left in the field: as such they have significant realised and potential value for tourism and education. In our recent work\, we have comprehensively reviewed the distribution of dinosaur track sites in the UK and their scientific and cultural ‘value’. Fourteen dinosaur track sites are present in situ in the UK today\, distributed across England\, Wales and Scotland\, and spanning from the Late Triassic to the Early Cretaceous. UK sites with considerable national and international scientific value include the Late Triassic dinosaur track site Bendrick Rock\, in South Wales\, and the Middle Jurassic site at Ardley and Dewars Farm quarries in Oxfordshire\, parts of the latter having been excavated by our research team in 2024 and 2025. By contrast\, the Early Cretaceous dinosaur track sites at Hanover Point\, Isle of Wight\, and Spyway Quarry\, Dorset have relatively high cultural value due to their accessibility and visitor appeal\, but modest scientific value. Our work helps identify threats and opportunities for UK dinosaur track sites\, potentially helping to guide future conservation\, scientific research\, and public engagement efforts.
URL:https://www.hertsgeolsoc.org.uk/event/the-value-potential-of-the-uks-dinosaur-track-sites/
LOCATION:Zoom Talk
CATEGORIES:Talks
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2024/12/RB-trackway-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260108T193000
DTEND;TZID=UTC:20260108T210000
DTSTAMP:20260404T110111
CREATED:20260110T142727Z
LAST-MODIFIED:20260111T152334Z
UID:19013-1767900600-1767906000@www.hertsgeolsoc.org.uk
SUMMARY:Stratigraphy & Sedimentology of Northern European Chalks
DESCRIPTION:given by Dr Haydon Bailey\, HGS Chairman\, Past GA president & geological advisor to the Chiltern Society \nAbstract:\n \nThe Upper Cretaceous Chalks of Northern Europe appear\, on the face of it\, to represent sedimentation during an extended period of relative tectonic and environmental stability. Nothing could be further from the truth. These uniform\, white\, fine grained carbonates are the sediments resulting from constant change in water temperature\, oxygen content\, dynamic water currents both at the sea surface and at depth.  \nBack in 1994 I presented a talk at a European conference entitled “Chalk\, white\, as above!”\, because that was the comment frequently seen on core logs\, geologists’ description sheets and engineering geologists’ well logs. Just how much information were we losing because of this phrase? Over the last 30 years our understanding of chalk deposition\, and the environmental conditions which control it\, have fundamentally shifted. Hopefully I can convince you that this might be the case. \nView This Talk In The Members’ Section. \nThis replaced the scheduled talk on Critical Minerals from Geology to circular economy: A matter of national security planned to be given by Professor Kathryn Moore\, University of Exeter. This was due to bad weather. Kathryn’s talk will be rescheduled to a later date. \n 
URL:https://www.hertsgeolsoc.org.uk/event/stratigraphy-sedimentology-of-the-northern-european-chalks/
LOCATION:over Zoom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260108T193000
DTEND;TZID=UTC:20260108T213000
DTSTAMP:20260404T110111
CREATED:20251117T172816Z
LAST-MODIFIED:20260110T142925Z
UID:16271-1767900600-1767907800@www.hertsgeolsoc.org.uk
SUMMARY:Critical minerals from geology to circular economy: a matter of national security
DESCRIPTION:talk given by Associate Professor Kathryn Moore\, University of Exeter \nAbstract:\nWith the imminent release of a new Critical Minerals Strategy\, the UK is updating its approach to national security. In this lecture\, I will highlight the security issues that threaten critical mineral supply chains into the UK and into most countries. I will explain how mitigation of the risks requires ground – truthing\, based on an understanding of geology and material properties\, as well as wider socioenvironmental and political considerations. I will discuss how the needs of critical minerals production is a challenge in terms of skills requirement\, and why the discipline of geology has never been more important. \nUnfortunately this talk had to be cancelled due to communication issues caused by Storm Goretti. The talk will be rescheduled for a later date.
URL:https://www.hertsgeolsoc.org.uk/event/critical-minerals-from-geology-to-circular-economy-a-matter-of-national-security/
LOCATION:over Zoom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260212T193000
DTEND;TZID=UTC:20260212T213000
DTSTAMP:20260404T110111
CREATED:20251117T172940Z
LAST-MODIFIED:20260213T141351Z
UID:16273-1770924600-1770931800@www.hertsgeolsoc.org.uk
SUMMARY:The end-Triassic mass extinction and its aftermath
DESCRIPTION:talk given by Professor Paul Wignall\, School of Earth and Environment\, University of Leeds  \nThe end-Triassic marks one of the big 5 mass extinctions of the fossil record and is also probably one of the least understand. It has many things in common with the preceding mass extinction at the end of the Permian. Both are associated with the eruptions of vast flows of basalt lava and both occurred whilst the world’s continents were united into a supercontinent. The talk will focus on some of the latest discoveries and ideas regarding both the mass extinction event and its aftermath. Unlike some other crises\, the recovery from the crisis was remarkably quick in a geological sense and it of course paved the way for dinosaur to dominate the planet for 135 million years. \nView This Talk In The Members’ Section.
URL:https://www.hertsgeolsoc.org.uk/event/the-end-triassic-mass-extinction-and-its-aftermath/
LOCATION:over Zoom
CATEGORIES:Talks
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2026/01/PW-2nd-phase-of-extinction.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260214T100000
DTEND;TZID=UTC:20260214T170000
DTSTAMP:20260404T110111
CREATED:20251210T075633Z
LAST-MODIFIED:20251210T075633Z
UID:17958-1771063200-1771088400@www.hertsgeolsoc.org.uk
SUMMARY:Little Heath Geoconservation
DESCRIPTION:Annual vegetation clearance
URL:https://www.hertsgeolsoc.org.uk/event/little-heath-geoconservation-2/
LOCATION:Little Heath\, Potten End\, Potten End\, United Kingdom
CATEGORIES:Field Trips
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260312T193000
DTEND;TZID=UTC:20260312T213000
DTSTAMP:20260404T110111
CREATED:20251117T173321Z
LAST-MODIFIED:20260227T121216Z
UID:16275-1773343800-1773351000@www.hertsgeolsoc.org.uk
SUMMARY:AGM - at our new Redbourne Parish Centre venue
DESCRIPTION:followed by refreshments and launch of the\nThe Hertfordshire 50th anniversary book – Mike Lambert & Nick Pierpoint \nThis meeting is being held in the Conference Room in the Parish Centre as shown on the map below\, but be aware that The Park refers to several side roads/cul-de-sac roads. \nFull address Redbourne Parish Centre\, The Park\, Redbourn\, near St Albans\, Hertfordshire\, AL3 7LR. \nBy Car:   Redbourn is easily accessible off the M1 Junction 9 then heading south of the A5183 Redbourn Bypass to the second roundabout at the southern end of High Street\, then up High Street bearing left onto Common Road and taking the 3rd turning on the left into The Park. \nThere is limited parking both in front of the Redbourn Parish Centre and to the rear of the centre on a first come first served basis. Elsewhere in Redbourn there is some on-street parking
URL:https://www.hertsgeolsoc.org.uk/event/agm-2/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:AGM
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2026/02/Image.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260321T080000
DTEND;TZID=UTC:20260321T170000
DTSTAMP:20260404T110111
CREATED:20251210T075845Z
LAST-MODIFIED:20260227T124349Z
UID:17960-1774080000-1774112400@www.hertsgeolsoc.org.uk
SUMMARY:Ver Valley Society Walk on the Chalk\, Dunstable Downs
DESCRIPTION:Herts Geol Society have a limited number of places available on this walk (5 – 6) organised by the Ver Valley Society. It will start at the Dunstable Downs National Trust Centre at 10am and will last until 1pm\, when we can get something to eat at the NT Centre. \nIf you’re interested in joining in on this walk\, then please contact Haydon via haydonbailey@outlook.com as he’s taking the bookings on behalf of HGS on a first come first served basis. Be prepared for a wet and very muddy walk; wear wellingtons or waterproof boots and expect muddy trousers!
URL:https://www.hertsgeolsoc.org.uk/event/joint-trip-to-ver-valley/
LOCATION:Hertfordshire
CATEGORIES:Field Trips
ATTACH;FMTTYPE=image/png:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2025/12/image3.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260329T100000
DTEND;TZID=UTC:20260329T163000
DTSTAMP:20260404T110111
CREATED:20251210T081210Z
LAST-MODIFIED:20260227T124632Z
UID:17962-1774778400-1774801800@www.hertsgeolsoc.org.uk
SUMMARY:The Ice-pushed chalk of the Chiltern escarpment between Barkway and Heydon
DESCRIPTION: Meet at the Silver Ball transport cafe\, which is on the A10 at Reed (SG8 8BD) at 10am for drinks and a bacon sandwich (cash only) and a loo stop. Leave for Barkway Pit at 10.30\, stopping at a view point on the way. Visit a small pit at Great Chishill. Pub lunch at the Pheasant\, Great Chishill. The day will finish at the Chalk pit at Heydon. The trip will concentrate on looking for evidence of glacis-tectonic structures and will finish around 4.30pm. \nFor folk who are interested in attending they should register with Mike Howgate mikeeh1086@hotmail.com
URL:https://www.hertsgeolsoc.org.uk/event/the-ice-pushed-chalk-of-the-chiltern-escarpment-between-barkway-and-hendon/
LOCATION:Silver Ball Transport Café\, Reed\, Royston London Road\, Royston\, Hertfordshire\, SG8 8BG\, United Kingdom
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2026/02/image4.jpeg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260409T193000
DTEND;TZID=UTC:20260409T213000
DTSTAMP:20260404T110111
CREATED:20260330T113356Z
LAST-MODIFIED:20260330T114444Z
UID:20064-1775763000-1775770200@www.hertsgeolsoc.org.uk
SUMMARY:49th Percy Evans Lecture: Snowballs in the Desert - A Glacial History of Oman
DESCRIPTION:given by Ross Garden\, Reading Geological Society\nRoss is kindly standing in for the scheduled speaker Dr Haydon Bailey. Haydon’s talk will now given at a later date. \nAbstract\nThe Earth has experienced repeated major icehouse periods through its history.  Across the UK\, we have many examples of the Plio-Pliestocene ice age deposits and in Scotland we see evidence of Pre-Cambrian Snowball Earth glaciations.  Sowhat might the Sultanate of Oman on the eastern margin of the arid Arabian Peninsula offer? \nOman lies on the Tropic of Cancer and the current climate is hot and arid with midday winter temperatures in the mid 20’s and summer temperatures reaching 40° C and above.  The arid climate\, together with the relative ease of movement and hospitality of the Omani people provides a geological wonderland.  There are many geological delights in Oman\, but the area provides a variety of geology resulting from previous glaciations.  We can see evidence for Proterozoic marine glaciations together with lacustrine deposits from the Permo-Carboniferous ice ages.  The lack of vegetation and long geological history of the area provides good out crops of the glacial formations and allows examination of lateral facies variations that typify these deposits. \nBut the Oman also contains evidence of the impact of high latitude glaciations on land masses at low latitudes.  The Omani Plio-Pliestocene history is characterised by ice driven sea level falls and rises\, compressed climatic zones and cooler and wetter periods.  As Arabia is situated between Africa and Asia these climatic changes are likely to have impacted the migration of homids out of Africa. \n\nGlacial dropstone in Permian Al Khlata deltaic sandstones\, Huqf
URL:https://www.hertsgeolsoc.org.uk/event/snowballs-in-the-desert-a-glacial-history-of-oman/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
ATTACH;FMTTYPE=image/png:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2026/03/image1.png
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260409T194500
DTEND;TZID=UTC:20260409T214500
DTSTAMP:20260404T110111
CREATED:20251117T173607Z
LAST-MODIFIED:20260330T113717Z
UID:16280-1775763900-1775771100@www.hertsgeolsoc.org.uk
SUMMARY:49th Percy Evans Lecture: The Geology of the Lower Chess Valley & where does all that water go?
DESCRIPTION:given by Dr. Haydon Bailey\, HGS Chairman  \nnow postponed to a later date. \n 
URL:https://www.hertsgeolsoc.org.uk/event/49th-percy-evans-lecture-the-geology-of-the-lower-chess-valley-where-does-all-that-water-go/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260514T194500
DTEND;TZID=UTC:20260514T214500
DTSTAMP:20260404T110111
CREATED:20251117T173747Z
LAST-MODIFIED:20251118T204823Z
UID:16282-1778787900-1778795100@www.hertsgeolsoc.org.uk
SUMMARY:Geology of Stonehenge and the bluestone controversy
DESCRIPTION:talk given by Prof. Peter Worsley\, Emeritus Professor of Quaternary Geology\, University of Reading
URL:https://www.hertsgeolsoc.org.uk/event/geology-of-stonehenge-and-the-bluestone-controversy/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260611T194500
DTEND;TZID=UTC:20260611T214500
DTSTAMP:20260404T110111
CREATED:20251117T173937Z
LAST-MODIFIED:20251118T204901Z
UID:16284-1781207100-1781214300@www.hertsgeolsoc.org.uk
SUMMARY:The Chalk Sea Ecosystem Project
DESCRIPTION:talk given by Dr James Witts\, Senior Post Doctoral Researcher\, Natural History Museum London
URL:https://www.hertsgeolsoc.org.uk/event/the-chalk-sea-ecosystem-project/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260709T214500
DTEND;TZID=UTC:20260709T214500
DTSTAMP:20260404T110111
CREATED:20251117T174115Z
LAST-MODIFIED:20251118T204930Z
UID:16286-1783633500-1783633500@www.hertsgeolsoc.org.uk
SUMMARY:Researching the Puddingstone Book
DESCRIPTION:talk given by Gerald Lucy\, Essex Rock & Mineral Society & Mike Howgate\, AGS & HGS
URL:https://www.hertsgeolsoc.org.uk/event/researching-the-puddingstone-book/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260718
DTEND;VALUE=DATE:20260719
DTSTAMP:20260404T110111
CREATED:20251224T114558Z
LAST-MODIFIED:20251224T114558Z
UID:18207-1784332800-1784419199@www.hertsgeolsoc.org.uk
SUMMARY:St Albans’ building stone walk
DESCRIPTION:Details to follow
URL:https://www.hertsgeolsoc.org.uk/event/st-albans-building-stone-walk/
LOCATION:Hertfordshire
CATEGORIES:Field Trips
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260910T214500
DTEND;TZID=UTC:20260910T214500
DTSTAMP:20260404T110111
CREATED:20251117T174244Z
LAST-MODIFIED:20251118T205032Z
UID:16288-1789076700-1789076700@www.hertsgeolsoc.org.uk
SUMMARY:The Deep Geology beneath southern England (TBC)
DESCRIPTION:talk given by Dr. Chris Pullen\, Director\, CP Exploration
URL:https://www.hertsgeolsoc.org.uk/event/the-deep-geology-beneath-southern-england-tbc/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20261008T194500
DTEND;TZID=UTC:20261008T214500
DTSTAMP:20260404T110111
CREATED:20251117T174437Z
LAST-MODIFIED:20251118T205106Z
UID:16290-1791488700-1791495900@www.hertsgeolsoc.org.uk
SUMMARY:Book Presentation - The Meteorites
DESCRIPTION:given by Helen Gordon\, Hertfordshire University & Author
URL:https://www.hertsgeolsoc.org.uk/event/book-presentation-the-meteorites/
LOCATION:Redbourne Parish Centre\, The Park\, Redbourne\, Hertfordshire\, AL3 7LR\, United Kingdom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20261017T100000
DTEND;TZID=UTC:20261017T163000
DTSTAMP:20260404T110111
CREATED:20251224T114300Z
LAST-MODIFIED:20251224T114300Z
UID:18202-1792231200-1792254600@www.hertsgeolsoc.org.uk
SUMMARY:Ashridge House and Gardens
DESCRIPTION:A walk around the house and gardens. \nMore details to follow.
URL:https://www.hertsgeolsoc.org.uk/event/ashridge-house-and-gardens/
LOCATION:Ashridge House\, Ashridge\, Berkhamsted\, Hertfordshire\, HP4 1NS\, United Kingdom
CATEGORIES:Field Trips
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20261112T194500
DTEND;TZID=UTC:20261112T214500
DTSTAMP:20260404T110111
CREATED:20251117T211640Z
LAST-MODIFIED:20251117T211640Z
UID:16296-1794512700-1794519900@www.hertsgeolsoc.org.uk
SUMMARY:Alpine peaks and salt intrusions - Geological windows into Earth's mantle
DESCRIPTION:given by Dr. Jonathan Turner\, Geologists’ Association Field Guide Editor
URL:https://www.hertsgeolsoc.org.uk/event/alpine-peaks-and-salt-intrusions-geological-windows-into-earths-mantle/
LOCATION:over Zoom
CATEGORIES:Talks
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20261210T194500
DTEND;TZID=UTC:20261210T214500
DTSTAMP:20260404T110111
CREATED:20251117T211803Z
LAST-MODIFIED:20251124T110521Z
UID:16298-1796931900-1796939100@www.hertsgeolsoc.org.uk
SUMMARY:The history of geological thought and exploration of the geology of the Himalaya
DESCRIPTION:given by Dr. Danny Clarke-Lowes\, Director\, Nubian Consulting
URL:https://www.hertsgeolsoc.org.uk/event/the-history-of-geological-thought-and-exploration-of-the-geology-of-the-himalaya/
LOCATION:over Zoom
CATEGORIES:Talks
END:VEVENT
END:VCALENDAR