From an erratic block of limestone of Siadlo Górne, Poland, some 20 teeth of Elasmobranchii were collected. A comparison with Oligocene faunas from the Netherlands and Belgium indicates that the age of this sandstone agrees with the lower part of the Brinkheurne Member/Ratum Member in the eastern part-of the Netherlands and the Nuculaclay near Tongeren in Belgium. The sandstone is slightly younger than the Berg Sands s.s. in the Tongeren area.