Figure F50. Photomicrographs of vein and radiolarian fillings in volcaniclastic silty claystone (Sample 200-1223A-6X-3, 113-116 cm; crossed polars). A. Zeolite, either wairakite or analcime, in a vein. B. Nearby silicate mineral (pumpellyite?). C-E. Zeolites in variably preserved radiolarian tests.