CALCAREOUS FORMATIONS, VOLCANIC MUDS, PALAGONITE-TUFFS
General Character, [317].—Coral Limestones, [318].—Foraminiferal Limestones, [319].—Pteropod-oozes, [320].—Foraminiferous Volcanic Muds, [321].—Samples, [322].—Altered kinds, [324].—Submarine Palagonite-tuffs of mixed composition, [326].—Samples, [330].—Altered Basic Tuffs, [332].—Submarine Basic Pumice Tuffs, [333].—“Crush-tuffs” formed of basic glass and palagonite, [334].—Zeolitic Palagonite-Tuffs, [334].—Palagonite-marls, [335].—Acid Pumice Tuffs, [336]
Pages [317-336]
CHAPTER XXIV
PALAGONITE
Its abundance in a fragmental condition in Vanua Levu, [337].—Its occurrence in deep-sea deposits, [338].—Modes of formation in situ, [338].—In the upper portion of a basaltic flow, [339].—In the groundmass of hemi-crystalline basaltic rocks, [339].—In veins in a basic tuff-agglomerate, [340].—In the fissures of a basaltic dyke, [341].—In the matrix of pitch-stone agglomerates, [349].—In “crush-tuffs,” [341].—Regarded as a solidified magma-residuum of low fusibility, [342].—Its connection with crushing, [342].—Bunsen’s experiment, [343].—Rosenbusch and Renard, [344].—The Nandua series of beds, [345].—Suggested explanation of the origin of palagonite, [346].—Type of basalt associated with palagonite, [347].—Hydration and disintegration of palagonite, [348]
Pages [337-349]
CHAPTER XXV
SILICIFIED CORALS, FLINTS, LIMONITE
Mode of occurrence of the silicified corals, [351].—Their character and structure, [352].—Flints, nodules of Chalcedony, Agates, etc., [353].—Other siliceous concretions, [354].—Jasper, [355].—Deposits of Limonite, [356].—Magnetic Iron-sand, [357].—Suggested explanation of the silicification of the corals, [358].—Note on a silicified Tree-fern, [360]