tuffs Definition

agglomerate, andesitic, dacitic, lapilli, palagonite, pumiceous, rhyolite, rhyolitic, vitric, are, welded, occur, interbedded, composed, associated, altered, contain, flows, derived, overlain, bedded, consist, formed, consists, deposited, containing, form, consisting, intercalated, dated, represent, metamorphosed, overlying, represented, exposed, overlie, underlying, erupted, recognized, volcanic, basic, crystal, basaltic, silicic, lithic, acid, fine, acidic, felsic, calcareous, green, stratified, coarse, thick, thin, minor, trachytic, massive, siliceous, zeolitic, silicified, intermediate, brown, reworked, soft, pyroclastic, fractured, laminated, sandy, lavas, breccias, agglomerates, rocks, sediments, basalts, formation, conglomerates, shales, composition, andesites, beds, rhyolites, series, age, layers, sequence, limestones, ashes, deposits, hair, lava, clays, porphyries, alteration, clarke, deposition, mudstones, sandstone, ages, cherts,