Table 1.

Table 1. Selected analyses of pyroxenes.

Notes: C = phenocryst or porphyroclast core, M = phenocryst or porphyroclast margin, µ = microcryst, N = neoblast. Formula unit calculated on the basis of 6 oxygens and 4 cations. Wo, En, Fs = molecular proportion of wollastonite, enstatite, and ferrosilite.