TY - JOUR A1 - Pracht, M. A1 - Timmerman, Martin Jan T1 - A late Namurian (318 Ma) 40Ar-39Ar age for kaersutite megacrysts from the syn-tectonic Black Ball Head diatreme: implications for the onset of Variscan deformation in SW Ireland Y1 - 2004 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/13970 SN - 0790-1763 ER -