Geologic Age: Permian Period
Other: Mudstone with subsidiary anhydrite-stone and gypsum-stone and trace dolostone and limestone. Stratified bedrock. Occurs onshore. Deposited during the Permian Period (298.9-252.2 Ma BP). Red shales and mudstones with local beds of gypsum and anhydrite, rare dolomitic limestones. Up to c.100m Conformable base on Penrith Sandstone Formation. Conformable upward passage to St Bees Sandstone Formation.
Usage: Current name