Saturday 20 August (Field meeting): Wren's Nest, led by Graham Worton. Meet at 10.00 by parking on the Harty Building of the old Mons Hill college site which you get to along the access road that leads into the new development adjacent to the Caves Pub on Wrens Hill Road. We will aim to be finished at around 12.30. We will wander around the reserve to re-examine the classic localities and update the science that we now know about the rocks here. It will provide an opportunity to collect from a couple of locations and discuss what we find in different places and what the palaeontological evidence tells us about the conditions in which these rocks were formed and deposited.