Geological research

My research has had two main aspects: 

The characterization of clay minerals and related layer silicates, particularly the modulated layer silicates.

Scanning electron micrograph of halloysite; a clay mineral formed of tubes almost 100 times finer than a human hair. This whole picture is of a patch of halloysite only about one hundredth of a millimeter wide.

Another, and very different fibrous mineral is antigorite, a form of asbestos. This image shows that such fibres can split into ever finer needles. If they lodge in the lungs they can cause mesothelioma, a form of cancer.
The understanding of mineral weathering and the way rocks become soil - the evolution of the regolith.

My recent research has been done with friend and colleague Professor Graham Taylor. We have focused on the formation of bauxite in the region of New South Wales between Tarago and Taralga. These are small deposits formed through the weathering of basalt lavas that flowed down valleys about 45 million years ago.

A slab of bauxite from the southern Highlands of New South Wales.  The brown particles are called pisoliths; they average 4 mm in diameter, are magnetic and are composed of aluminium and iron oxides.

A scanning electron micrograph of bauxite from the Southern Highlands. The white round particles are similar to those shown above, but ten times smaller. They form the material between the pisoliths. Grey particles marked 'Q' are grains of quartz sand.

From this work came the paper:
Taylor, G., & Eggleton, R. A. (2015). Bauxites of the NSW Southern Highlands.Australian Journal of Earth Sciences 62, 341-363.

And two conference abstracts about bauxite:

Post-retirement research
The geology of the Cretaceous volcano in south eastern New South Wales, now known as Gulaga but formerly as Mt Dromedary, was a topic I enjoyed during my teaching years, and since retiring I have updated the booklet I wrote about it, The Golden Volcano
More recently I have become interested in the relationship between granite types and landscapes, leading to the paper Mineralogy maketh mountains: Granitic landscapes shaped by dissolution. Geomorphology285, 363-373.