sinusoidal projectionsiphon spillwaysiphonapterasiphonostomatous or holostomatous or holostomatoussiphunclesiroccositesite draingesite tests or field tests or field testssitinakitesiyahu formation or siyahu or siyahu or syahusjogrenite or sjoegrenite or sjoegreniteskaergaarditeskarnskartrag or sickle trough or sickle troughskedophyreskedophyricskeletalskeletal duplicature or duplicature or duplicatureskeletogenesisskeletonskeletonizationskeletons lineskewskew weirskiagiteskiagramskidskiddavian or arenigian or arenigianskimming flowskin effectskinneriteskiodromeskipskip mark or skip marks or skip marksskippeniteskjergaard or skerry or guard or skerry or guardskleropeliteskomeriteskutterudite or smaltite or smaltiteskythian or scythian or scythianslab and buttress type damslab or pull or slab pull or slab pullslab or slabs or slabsslab pahoehoeslab suctionslackslack or waterslafe barslag or scoria or scoria
