Browsing by Author "Wacker J.F."

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  • EXPOSURE HISTORY OF THE ST-ROBERT (H5) FALL 
    Leya I.; Wieler R.; Aggrey K.; Herzog G.F.; Schnabel C.; Metzler K.; Hildebrand A.K.; Bouchards M.; Jull A.J.T.; Andrews H.R.; Wang M.-S.; Ferko T.E.; Lipschutz M.E.; Wacker J.F.; Neumann S.; Michel R. (2001)
    The compositionally typical H5 chondrite St-Robert has an exposure age, 7.8 Ma, indistinguishable from that of the main cluster of H chondrites. Small values of the cosmogenic 22Ne/21Ne ratio in interior samples imply a ...
  • NOBLE GASES IN THE DIAMOND-FREE UREILITE, ALHA 78019: THE ROLES OF SHOCK AND NEBULAR PROCESSES 
    Wacker J.F. (1986)
    Primordial noble gases were measured in the unshocked ureilite ALHA #78019 (hereafter 78019) and in the moderately shocked ureilite Kenna. Much of the gas (> 25%) in 78019 is contained in fine-grained, amorphous carbon, ...