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Miospores of Triassic age and organic-walled microplankton from the Auchenhew Beds, south-east Arran

Synopsis Miospores indicative of a late Early or early Middle Triassic (late Scythian or Anisian) age have been obtained from the lower part of the Auchenhew Beds (upper lithostratigraphical unit of the ‘New Red Sandstone’ sequence) of Arran. Organic-walled microplankton, occurring with the miospores, may indicate that the depositional environment of the Auchenhew Beds was marine or in connection with a marine source.