 Both of these areas rest on the younger Jurassic dolerite deposits, before stretching into the lower areas such as the beaches of Sandy Bay in the south, in the Derwent estuary.South of the Derwent estuary lies Storm Bay and the Tasman Peninsula.The Eastern Shore also extends from the Derwent valley area in a southerly direction hugging the Meehan Range in the east before sprawling into flatter land in suburbs such as Bellerive.