Abstract
The terminology used for olivine-bearing xenoliths found in kimberlites and basalts is reviewed with attention to those textural varieties showing varying degrees of deformation and recrystallization. A set of consistent textural terms and rock names is presented and correlated with previous terminology. Definitions are presented emphasizing descriptive rather than genetic elements. The principal xenolith textural types defined are: coarse, porphyroclastic, mosaic-porphyroclastic, and granuloblastic. Subtypes of these principal types are recognized on the basis of other textural characteristics defined as: equant, tabular, laminated, fluidal, and disrupted.
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