Chrysoprase results from the deep weathering or ultramafic ophiolite rocks.
2.
Deep weathering can occur in cooler climates, but over longer periods of time.
3.
Saprolites form in the lower zones of soil profiles and represent deep weathering of the bedrock surface.
4.
Deep weathering of the crust over many millions of years leached chemicals out of the rock, leaving Australian soils deficient in nutrients, particularly phosphorus.
5.
Deep weathering causes the formation of many secondary and supergene ores & ndash; bauxite, iron ores, saprolitic gold, supergene copper, uranium and heavy minerals in residual accumulations.
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