"Counter Head Siltstone Formation"@en . . "412.4"^^ . "Counter Head Formation [Obsolete: use CHST]"@en . . . "East Harbour Formation [Obsolete: use CHST]"@en . . "Base of siltstone sequence conformably resting on the red conglomerate sandstones of the Dundarg Formation."@en . "stable"@en . . . "Incoming of the first ripple cross laminate fine-grained micaceous sandstones of the Gamrie Bay Formation."@en . "100m+"@en . "394.3"^^ . "Counter Head Siltstone Formation"@en . "Bed 3 (lower part of Crovie Group) [Obsolete: use CHST]"@en . "CHST"@en . "Siltstone with subsidiary mudstone and sandstone. Stratified bedrock. Occurs onshore. Deposited during the Pragian Age - to - Emsian Age (Devonian Period) (412.4-394.3 Ma BP)."@en . "Siltstone with pedogenetic carbonate."@en . . . .