Fluid Crossings: Geodiversity & Art Walk Stop at Natural Pond with Geologist Diana Clements. Start at Abbey Wood – with artist Gail Dickerson & geologist Diana Clements Shark Tooth Fossil – at fossil bed in Abbey Wood – a 55 million old marine environment Conduit Pond – Dark Waters. Coming out of Bostall Woods -looking down at the Wogebourne River Valley. Leaving the Dog Stones of Plumstead Common. At the Dog Stones of Plumstead Common – natural concrete forms. In the Gallery at Gail’s installation, drawing and objects from London geological cores.