Mr Yeabsley and Mr Hayler do their best to work with flimsy maps as they explain the formation of Old Harry. The eroded chalk headland of Old Harry Rocks at the Foreland.   Looking south towards Swanage Bay past impressive chalk cliffs and two stacks. Mr Hayler and 6B students on the dunes at Studland. View over a dune slack at Studland.  Here, trees such as birch and willow have succeeded marram and heather in places where the water table is closer to the surface. Salt marsh in Poole Harbour at low tide.  Here, plants such as eel grass and glasswort (Salicornia) that tolerate submergence in salty water are replaced closer to the land by sea purslane (Halimione) and sea rush (Juncus).