New Caledonia is known for the diversity of its geological substrates, which have shaped highly original and diverse flora. Here, effect soil on vegetation described several contact zones between ultramafic other substrates. The main formations soils derived from rocks are described: low medium altitude rainforests, high maquis. types maquis biological characteristics species also presented.

Abstract Hadean zircons, from the Jack Hills (Western Australia) and other localities, are currently only window into earliest terrestrial felsic crust, formation of which remains enigmatic. Based upon new experimental results, generation such early crust has been hypothesized to involve partial melting hydrated peridotite interacting with basaltic melt at low pressure (<10 km), but it y...