Chica, Ivan - Stratigraphical problems of the Miocene in Europe. wrps., spine just a little worn, contents very good, 4to. in pocket) with fossils (ammonites, ostracods, a.o.). - Biostratigraphie der germanischen Mitteltrias Teil I, II & Anlagen. cloth, dustjacket, dustjackets with (minor) traces of use only, otherwise very good. 50Simpson, George Gaylord - Tempo and mode in evolution.
(ed.) - Zum Ober-Bathonium (Mittlerer Jura) im Raum Hildesheim, Nordwestdeutschland. Upon impact with the Earth's atmosphere, cosmic rays can produce showers of secondary particles that sometimes reach the surface.Composed primarily of high-energy protons and atomic nuclei, they are of mysterious origin.At the higher end of the energy spectrum, relativistic kinetic energy is the main source of the mass-energy of cosmic rays.The Oh-My-God particle, the highest-energy fermionic cosmic ray detected to date, had an energy of about times more energetic than the highest-energy detected cosmic photons.