TY JOUR TI Two spinel populations from the Cretaceous-Paleogene K/T boundary clay layer in the Gams stratigraphic sequence, Eastern Alps KW K/T boundary KW spinel KW impact KW Eastern Alps. JO Russian Journal of Earth Sciences AU Grachev, A.F. AU Tselmovich, V.A. AU Korchagin, O.A. AU Kollmann, H.A. PY 2007 IS 9 PB Geophysical Center of the Russian Academy of Sciences