Comment on "Impact ejecta layer from the mid-Devonian: possible connection to global mass extinctions".
Racki
Grzegorz
G
Department of Earth Sciences, University of Silesia, PL-41-200, Sosnowiec, Poland. racki@us.edu.pl
Koeberl
Christian
C
D000818:Animals; D017753:Ecosystem; D019015:Geologic Sediments; D008280:Magnetics; D019110:Meteoroids; D012623:Seawater; D013995:Time