Exotic composition (rock)

Keyword Definition

Rock with 'exotic' mineralogical, textural or field setting characteristics; typically dark colored, with abundant phenocrysts. Criteria include: presence of greater than 10 percent melilite or leucite, or presence of kalsilite, or greater than 50 percent carbonate minerals. Includes Carbonatite, Melilitic rock, Kalsilitic rocks, Kimberlite, Lamproite, Leucitic rock and Lamprophyres.

Gillespie and Styles 1999; LeMaitre et al. 2002

Parents: Igneous rock (138)

Children: Carbonatite (49); Exotic alkaline rock (82); Kalsilitic and melilitic rocks (151)

[Description taken from GeoSciML SimpleLithology201012.rdf]

Hierarchical classification

Sample >> Lithosphere >> Rock >> Whole >> Rock >> Igneous >> Exotic composition


Carbonatite | alkaline (Exotic) | Kalsilitic and melilitic

Category: Analysed material

The different kinds of sample material collected in the field have been classified hierarchically. Examples: “till”, “soil”, “vegetation”. Taken from the “Sample_Types_SHARED” database table.

Date modified: