资料来源 : Webster's Revised Unabridged Dictionary (1913)

Purbeck beds \Pur"beck beds`\ [So called from the Isle of
   Purbeck in England.] (Geol.)
   The strata of the Purbeck stone, or Purbeck limestone,
   belonging to the O["o]litic group. See the Chart of
   {Geology}.