Report of the Committee on the Measurement of Geologic Time

Abstract Acad age ratio allanite ammonia ammonium acetate ammonium carbonate Anal analysis anhydrite aqua regia Archangelski atomic weight average Baxter beds bibliography Bull C. M. Alter Carboniferous Chem Chim cleveite color committee concentrated Cong cool core Couplets Cretaceous crucible crystal cycles deposits determination detns dilute HCl dissolve evaporate Exhibit filter filtrate fume Geol geologic grams Hecht helium HNO3 ignite isotopes John Putnam Marble Kroupa Lake laminae Lane layers lead material method minerals monazite neutron Nipkow nitric acid non-glacial varves Ordovician organic matter oxalic oxide paper Pb/U pegmatites Phys pitchblende possible pre-Cambrian precipitate Proc protactinium Ra content radioact radium rare earths Repts residue rinse rocks salt samarskite sample sediments sepn shale solution specimen steambath studies thick thorium uraninite uranium Urry variation warm wash Washington Wilberforce uraninite Wolansky XVI Sess zone