fluid inclusions can inform about the chemical composition of seawater. The trapped seawater in sediments evaporates and leaves behind the salt content. The depth at which these evaporites are found relative to the composition of the trapped salt allows oceanographers to reconstruct seawater evolution. Air bubbles trapped within the deep ice caps can also be analyzed for clues to ancient climate conditions. See also Melt inclusions Inclusion (mineral) References External links Fluid inclusions - USGS Amber inclusion - USGS* Fluid Inclusion Research at NUI, Galway. Geochemistry Mineralogy Petrology