Geology of Crimdon Beach (Joint trip with NOUGS)

Join NHSN's Earth Sciences Group to explore the geology of Crimdon Beach on a joint trip with the Open University Geology Society Key Information Event leads: Karl Egeland-Eriksen & Brenda Turnbull Date/length: 1 session, Saturday 19 September, 10.30 am-4 pm Event cost: £5 NHSN Members/£7.50 Non-Members Meet at: Crimdon Beach Car Park, NZ482371 W3W: inclined.lunge.holly Please do not use the automatic location given by Eventbrite. Find a grid reference: https://gridreferencefinder.com About this Event Rocks along the Durham Coast were formed around 255 Ma in an inland sea – the Zechstein. Changing sea levels repeatedly cut off the Zechstein from its source resulting in the sea drying up. Magnesian Limestone formed in the basin, capped by salt layers during the last stages of evaporation. 5 cycles of flooding and evaporation are recognised, three of which are present in the north-east. The uppermost of these is the Seaham Formation which is exposed in the cliffs behind Crimdon Beach. Amazing concretions, breccias and fossils are present, along with an unusual band of orange sediment. Essential equipment Sturdy footwear, outdoor clothing, lunch.