Limestone
Most limestone for agriculture is mined and crushed from coastal deposits of Tamala limestone (Figure 3 and 4). This limestone is 1-2 million years old and was formed by cementation of limesand deposits, either by the action of rainfall wetting and drying or when the deposits were submerged during periods of high sea level. The composition and purity of limestone also varies between deposits.
Figure 3 Limestone mine near Myalup
Figure 4 Close-up of agricultural limestone from a pit near Myalup