adjective

• (of rocks or sediment) consisting of or containing clay.

  ‘It is predominantly found in the marl areas but also, more rarely, in fine-grained argillaceous limestones.’

  More example sentences

  • ‘The 284 m section is composed of calcareous shales, argillaceous limestone, and limestone.’
  • ‘They were found as scattered individuals in the argillaceous limestones.’
  • ‘These specimens were mostly weathered out from dark gray, argillaceous limestones.’
  • ‘In the footwall, there is density increase and porosity reduction of the argillaceous matrix approaching the fault.’