Figure F11. Major constituents of silty clay-sized serpentine encountered in smear slides of the fine-sand fraction (63- to 344-µm grain size). A. Pale bluish amphibole under plane-polarized light. B. Pale bluish amphibole under crossed polarizers, revealing internal zonation. C, D. Elongated authigenic aragonite laths (Ar), blue amphibole (Am), and serpentine flakes (Serp-A2). E, F. Bunches and "mikado"-like clusters of tiny aragonite needles.

Figure F11. Major constituents of silty clay-sized serpentine encountered in smear slides of the fine-sand fraction (63- to 344-µm grain size). A. Pale bluish amphibole under plane-polarized light. B. Pale bluish amphibole under crossed polarizers, revealing internal zonation. C, D. Elongated authigenic aragonite laths (Ar), blue amphibole (Am), and serpentine flakes (Serp-A2). E, F. Bunches and "mikado"-like clusters of tiny aragonite needles.