A midden excavation - Royal Tasmanian Botanical Gardens, Hobart.

Radiocarbon analysis of charcoal taken from the base of a midden located within the Royal Tasmanian Botanical Gardens, Hobart, indicates that first occupancy of this site occurred some 5 000 years ago. The mussel Mytilus edulis planulatus provided the bulk of the shellfish diet which may have been supplemented with a number of small species including the gastropods Bembicium auratum and Austrocochlea constricta zebra. A feature of this site is the relatively rich supply of petrologically diverse stone artefacts. This is at variance with the general pattern for middens previously excavated in the Derwent River estuary. Also present are small, round, hard pebbles, a feature not previously reported from similar sites on the Derwent River. Scanning electron microscopic analysis of charcoal indicates that the she oak Casuarina stricta provided some of the wood fuel for fires at this site.