@article{PrachtTimmerman2004,
  author    = {Pracht, M. and Timmerman, Martin Jan},
  title     = {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},
  issn      = {0790-1763},
  year      = {2004},
  language  = {en}
}