DUST TO DIRT
To start at the very beginning on this topic we need to go back to the last ice age — the one we didn’t have.
One of the main ways soil is formed is by the gradual grinding action of glaciers on rock, turning it into mineral-rich dust, which then combines with organic matter from plants and animals to form soil. Soils vary according to the types of rocks (parent material), plants, animals, weather conditions and length of time that have gone into its making.
An ice age is great for the earth’s topsoil as the temperature differences break up the rock mantle and the ice grinds it to form a new deep layer of soil. Because Australia
