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David Webster

@davidjwebster.bsky.social

196 followers 163 following 18 posts

Geologist, Islay geology guide book author, Fossil Grove trustee, whisky lover. Secretary Geological Society of Glasgow.

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David Webster @davidjwebster.bsky.social · 11/06/2026

Open afternoon at the Fossil Grove. Sunday 14th June 12-4. A Science Festival Event. www.gla.ac.uk/events/scien...

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David Webster @davidjwebster.bsky.social · 11/06/2025

Come to the Fossil Grove this Sunday (15th) - anytime 12-4. Come and hear about what's going on with the renovation programme. Tours of the quarry area. Children's activities. Displays and fossils. (Note: The building itself is closed). www.fossilgroveglasgow.org

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David Webster @davidjwebster.bsky.social · 01/06/2025

Good turn out today for a geology walk on the Rhinns of Islay. 1.8 Ga Metagabbro and syenitic gneiss. Triassic faulting, Paleocene dykes and late glacial raised beaches... www.islaygeology.org

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David Webster @davidjwebster.bsky.social · 28/12/2024

@bobgooday.bsky.social bob, any idea about this rock? i was sent a photo and would like to get back to the sender. its from lamlash on arran so immediately thought of you! i think some form of explosion breccia with a carbonate infill? thanks

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David Webster @davidjwebster.bsky.social · 22/11/2024

Nice anticline in metagreywackes at Saligo Bay, Islay. The area is known as The Arches' after the fold. Colonsay Group (earliest Dalradian, c. 800 Ma) #fridayfold

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David Webster @davidjwebster.bsky.social · 23/08/2024

New paper helps tie down the start, age and duration of the Cryogenian 'Sturtian' glaciation. Zircons in the Port Askaig Formation from the Garvellach Islands show YSG younging-upwards and help the case for a 'Golden Spike' there. For now we make do with a golden carrot! doi.org/10.1144/jgs2...

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David Webster @davidjwebster.bsky.social · 05/03/2024

Geological Society of Glasgow Monthly Lecture - Thursday 14th March 2024 Dr. Murray Reid, “What lies beneath: the geology of Strathkelvin” Boyd Orr Building 7.00 pm

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David Webster @davidjwebster.bsky.social · 10/02/2024

We find these in the 650 Ma Bonahaven Formation on Islay. We call them Flake Breccias ie bits of ripped up or wind-blown microbial mat deposited in dessication cracks ...aka flake pockets.

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David Webster @davidjwebster.bsky.social · 02/02/2024

Geological society of glasgow - Next lecture Biogeochemical cycling of essential elements within Mars analogue sites by Toni Galloway (St Andrews). Thursday 8th Feb 19:00 by zoom. us02web.zoom.us/j/87137408991?…

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David Webster @davidjwebster.bsky.social · 30/11/2023

TV camera at the fossil grove today. Much excitement! Glasgow City Council has agreed to fund £450,000 worth of repairs to the building to help conserve the fossils for future generations to enjoy.. a big result for geoconservation!

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David Webster @davidjwebster.bsky.social · 25/11/2023

The 'billion-year gap' at Kilchiaran Bay, Islay. 1.8 Ga gneiss on right, 800 Ma meta-arkoses on left. Sinistral shear sense.

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