Figure F17. Smear slide photomicrographs of Samples 198-1207B-18H-5, 90-91 cm (top), and 18H-5, 50-51 cm (bottom), from the Miocene condensed zone showing concentrations of tan/brown phillipsite crystals. These exhibit zoning and twinning (x-shaped crystal cluster in lower view). Note the fish tooth in the upper center of the top view. Both views are under plane-polarized light.

Figure F17. Smear slide photomicrographs of Samples 198-1207B-18H-5, 90-91 cm (top), and 18H-5, 50-51 cm (bottom), from the Miocene condensed zone showing concentrations of tan/brown phillipsite crystals. These exhibit zoning and twinning (x-shaped crystal cluster in lower view). Note the fish tooth in the upper center of the top view. Both views are under plane-polarized light.