Noel Schleiger explained the geological history of the South-eastern Australian High Country and of relevant areas further afield.

Recent advances in technology have improved knowledge about structures below the Earth's surface.

Beginning with the Ordovician, and moving forwards to the Pleistocene, many factors, in turn, have influenced what we have now. These facors include:-

• the kind of rock present (e.g. granite or basalt)
• temperature and latitude
• the drifting of continents, especially the break-up of Gondwana in the Cretaceous
• changes in sea level.

The talk was illustrated by slides which included specific examples of rock formations in the High Country of Victoria and New South Wales.

Alison Green

1: Granite tors. A granite landscape. Mt Buffalo.
2: Basalt rocks at Basalt Hill. Bogong High Plains.