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X-ORIGINAL-URL:https://www.hertsgeolsoc.org.uk
X-WR-CALDESC:Events for Hertfordshire Geological Society
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DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20260611T194500
DTEND;TZID=UTC:20260611T214500
DTSTAMP:20260525T211940
CREATED:20251117T173937Z
LAST-MODIFIED:20260522T142433Z
UID:16284-1781207100-1781214300@www.hertsgeolsoc.org.uk
SUMMARY:ChaSE-ing the chalk: the Chalk Sea Ecosystems project and Late Cretaceous
DESCRIPTION:talk given by Dr James Witts\, NERC Postdoctoral Fellow in Palaeoecology\, Natural History Museum\, London \nAbstract:\nThe onshore Chalk Group of the United Kingdom provides a continuous and well-exposed rock and fossil record spanning the Late Cretaceous (Cenomanian –Maastrichtian stages\, ~100 – 72 Ma). As an economically important resource\, the chalk has been quarried and studied for >200 years and a detailed stratigraphic framework is available. The sequence is abundantly fossiliferous\, recording every marine trophic level from nanno- and phytoplankton to benthic and nektonic molluscs and apex predators. Key events recorded in the Chalk include carbon cycle perturbations during the middle Cenomanian and across the Cenomanian – Turonian boundary (Oceanic Anoxic Event 2 – also associated with peak Cretaceous climate warming and a biodiversity crisis)\, the highest global sea-levels of the last 250 myrs during the Turonian\, and a long-term climate cooling which culminates with the coldest temperatures of the Late Cretaceous during the Maastrichtian. \nThe Natural History Museum\, London (NHMUK) alone contains >55\,000 UK Chalk Group macrofossil specimens\, including rare taxa and material from now inaccessible localities. Only a fraction of these have been published or are available in public datasets. Many specimens contain limited metadata\, and ages or stratigraphic position are poorly constrained. To unlock these ‘dark data‘ we are re-dating >1\,500 macrofossil specimens using calcareous nannofossil biostratigraphy. Combining these with data from new fieldwork\, we are conducting the first ‘whole-ecosystem‘ study of the functional diversity and ecology of the Chalk Sea\, providing an unprecedented record of the effects of global Cretaceous climate change on marine ecosystems at a variety of temporal and spatial scales\, all within the same depositional system. \nBiography:\nI trained as a geologist with an MEarthSci degree from the University of Manchester (2009)\, completing a PhD on the Cretaceous-Paleogene (K-Pg) mass extinction event in Antarctica with the University of Leeds and British Antarctic Survey in 2016. I then hopped ‘across the pond’ for a Lerner-Gray Postdoctoral Research Fellowship at the American Museum of Natural History in New York (2016-2018) and a postdoctoral position at the University of New Mexico in Albuquerque (2018-2020)\, studying Cretaceous and Paleogene macrofossils and ecosystems in the US Gulf Coast and Western Interior. After a stint as Lecturer in Palaeontology at the University of Bristol (2021-2023)\, I moved to the NHM as a NERC Postdoctoral Fellow in Palaeoecology in September 2023.
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
ATTACH;FMTTYPE=image/jpeg:https://www.hertsgeolsoc.org.uk/wp-content/uploads/2025/11/20250720_154859-Eastbourne-Gun-Gardens-C-T-scaled.jpg
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260709T214500
DTEND;TZID=UTC:20260709T214500
DTSTAMP:20260525T211940
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
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BEGIN:VEVENT
DTSTART;VALUE=DATE:20260718
DTEND;VALUE=DATE:20260719
DTSTAMP:20260525T211940
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/
LOCATION:Hertfordshire
CATEGORIES:Field Trips
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260910T214500
DTEND;TZID=UTC:20260910T214500
DTSTAMP:20260525T211940
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:20260525T211940
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:20260525T211940
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:20260525T211940
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:20260525T211940
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
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