This is a complex of three scoria cones and a possible maar. From a distance it appears as a group of prominent hills between the You Yangs and the Brisbane Ranges. Mount Rd runs between the most northwest cone and the maar and is a good way to observe many of the features. Alternatively, you can visit Del Rios vineyard on the southern slopes of the main cone and after a drink at the cafe ask about access. The Lovely Banks monocline runs south from here to Geelong as a linear bank. It is not known if this feature is related to the volcanoes.
Stockyard Hill is maar-like, but has associated lava flows and scoria desposits and it likely to have a complex eruption history.The Stockyard Hill Windfarm project has produced some interesting documentation about this area, and photos and information about Stockyard Hill can be found