15 pages matching iridium and osmium in this book
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A Body Has Been Found
Clues from the Clays
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65 million acid aerosols amount angiosperms archosaurs atoms biological birds body boundary clays carnivores catastrophe caused chemical climate cloud comet concentrations cool crater Cretaceous Period crust dense dinosaurs disappeared dust Earth effect eggs elements energy entered the atmosphere environment eruption event evolved exist explosion fish fossils galaxy Gubbio habitat happened heat hemisphere herbivores homoiothermic human increase iridium iridium and osmium isotopes kilometres per second Krakatoa land large animals layer less magnetic field mammals mass material metals meteorites metres microorganisms million years ago Mount St Helens move nitrogen noble metals North Atlantic occurred ocean orbit osmium oxides oxygen ozone particles perhaps planetesimal planetesimal impact plants plasma poikilotherms possible probably produce pterosaurs radiation remains reptiles rock seabed sediment soil solar system solid species stratosphere supernova surface survived temperature terrestrial Tertiary tropopause troposphere viviparous volcanic warm waves