This information has been developed from the publications:
325499. 3.5 kilometres east of Genoa
Doleritic ring dyke
A ring dyke of doleritic composition intrudes Ordovician Mallacoota Bed sediments at Yandown, east of Genoa. The dyke rocks are highly weathered and exposures are poor.
Differential erosion, of the evidently softer dyke material, by two streams has produced a circular drainage pattern.
Regional. This is the only ring dyke that has been recorded in the region.
Land use which would obscure the ring dyke would degrade the site.
Douglas, J.G. and Ferguson, J.A. (eds) 1976. Geology of Victoria. Geological Society of Australia, Special Publication No. 5.