Historical information

The low rolling hills of the Kimbolton countryside consist of ancient, hard and fractured Ordovician rock up to 65 million years old, which was originally deposited deep under the sea. Rocks mainly are sandstone, mudstone, black shale and quartz conglomerates. Marine fossils can be found in the area. Around seven million years ago a basalt flow buried the original bedrock along the along the Campaspe River.

Ongoing weathering, wind and water movement over the following years has produced younger clay, sand, silt and gravel deposits throughout the area. Patches of White Hills Gravel are also found in the area.

Another unique geological feature of this area is the Permian Glacial Pavement rocks north and south of Eppalock and glacial sediments (such as “Dunn’s Rock” and “Kellams Rock”).

During the ice age (up to 280 million years ago) large glaciers moving over the countryside, scoured out sediments, pulverized bedrock, polished and cut grooves into bedrock in the direction of ice movement. When the ice melted boulders etc where left behind in areas of entirely different rock types, such as a 100 Tonne granite block known as ‘The Stranger’ near Derrinal.

Physical description

Dunn's Rock (Glaciated Pavement) Eppalock - Photos of the rock and a field group collecting date with Lake Eppalock (Knowsley) in the background