BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Hertfordshire Geological Society - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.hertsgeolsoc.org.uk
X-WR-CALDESC:Events for Hertfordshire Geological Society
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260321T080000
DTEND;TZID=UTC:20260321T170000
DTSTAMP:20260422T230706
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/
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:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
CREATED:20251224T114558Z
LAST-MODIFIED:20260405T162211Z
UID:18207-1784332800-1784419199@www.hertsgeolsoc.org.uk
SUMMARY:St Albans’ building stones walk
DESCRIPTION:with Haydon Bailey\, geological advisor to the Chiltern Society. \nThis is a joint event with the Bucks Geology Group. PLACES LIMITED – BOOKING ESSENTIAL. \nFor more information and to book you place\, please contact Mike Palmer at mpalmer@discoverbucksmuseum.org
URL:https://www.hertsgeolsoc.org.uk/event/st-albans-building-stone-walk/
CATEGORIES:Field Trips
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260910T214500
DTEND;TZID=UTC:20260910T214500
DTSTAMP:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
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:20260422T230706
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
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