A large group set out from the side of Mt Tarrengower on a chilly, but sunny day yesterday for FOBIF’s annual ‘short walk’. Bernard and Deirdre Slattery led the walk ably assisted by our experts, including Christine Henderson on geology, Frances Cincotta on plants and Joy Clusker on fungi.

Group photo by Liz Martin
We set out to look at the geological history of Mt Tarrengower. The rock caps consisting of the hornfels rocks were abundant around the top area but the granite rocks that rose as magma appeared lower down. We had several terrific viewpoints as we wandered around the contours of the mountain looking out to misty ranges and we could see as far as Mount Macedon.
The research about the geology came from the book Six Peaks Speak by Barry Golding and Clive Willman.
” Dharrang Gawa‘s geological makeup has given it two different faces revealed by walking either side of the summit. Large granite boulders are predominant on the way up , but then you encounter dense rocks called hornfels. The huge area of the Harcourt Batholith includes Mt Alexander and was formed when the magma was hot. Once the magma rose it baked the surrounding sandstone and mudstone and this metamorphosed the rocks above into hornfels.” We were able to clearly identify the difference between the granite and the hornfels.
“The hornfels were hard and used to create stone tools by Dja Dja Wurrung and also formed part of Maldon’s building history being used in gutters and buildings including the Maldon Holy Trinity Church.”
We also found lots of fungi and some lovely striped greenhoods in amongst the rock ferns. These three photos were taken by Joy Clusker and are left to right: Large-striped Greenhood, Earthstars and Belly Buttons.
Early wildflowers were blooming including Early Nancy and Rice Flowers. The eucalypts were mostly Long-leaf Box, Grey Box and Yellow Box.
Some players from the women’s footy team, the Castlemaine Falcons, joined us. Thanks to everyone who added to our local knowledge of the geology and natural features of Mt Tarrengower. A very enjoyable walk of 3 kilometers with time to look at the small plants and fungi while identifying the granite and the hornfels, and even do a little weeding!

Chrissi pulling out Boneseed, photo by Liz Martin
Liz Martin











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