chemical / Chemical discriminant features / chemical composition / chemical characteristics / mineral/ chemical composition / retrieval systems / /
Organization
International Union / Geological Sciences Subcommission on the Systematics of Igneous Rocks / wt% MgO and TiO2 Division / Review Panel / TiO2 Division / IUGS Subcommission on the Systematics of Igneous Rocks / /
Position
present chairman / current IUGS chairman / geologist / Rock Classification Coordinator / Fisher / mineral qualifier / genetic qualifier / Chairman / qualifier / Marshall / /