Mudstone from the Kin Kin beds sedimentary and metamorphic group.
The Kin Kin beds are an extensive group in the Cooloola Coast region and comprise sedimentary rocks such as mudstone, siltstone and sandstone as well as metamorphic phyllite.
Images are examples of specimens only.
Size and shape may vary.
Specimens are usually no smaller than 150mm in at least one dimension.