Three Fingers of Lower Greensand near Oxford 🪨
Nigel Banks unpacks the three strikingly different sand-rich deposits of the Lower Greensand Group found near Oxford — at Faringdon, Nuneham Courtney and Tiddington — laid down when a rise in sea level during the Aptian (early Cretaceous) flooded parts of the London Platform. A free evening lecture from the Oxfordshire Geology Trust.
What to expect:
🪨 A journey into local deep time — How a marine transgression around 120 million years ago left isolated pockets of sand perched on an eroded Jurassic landscape beneath Oxfordshire
🗺️ Mapping the three sands — How the contrasting thicknesses and geometries of the Faringdon, Nuneham Courtney and Tiddington deposits have been traced in the subsurface — and the mysteries that remain
💬 Free lecture with Q&A — No booking required; a suggested donation of £5 on the door keeps the Oxfordshire Geology Trust’s lecture programme running