Forest Formation
Forest Formation
Sediments of the Forest Formation represent cyclical marine deposition under turbid water and clear water environments.
Sandstones are strongly foreset bedded and lenticular. In grade they range from fine-medium grained to coarse grained,
and are generally poorly sorted. Carbonaceous inclusions are common and residues from side wall cores have yielded
glauconite. The sandstones alternate with grey and buff coloured silts and blue-grey and grey-green non-calcareous
shales. The latter are frequently lignitic and usually unfossiliferous. Slump structures are common.
Maximum thickness is of the order of 2500 feet. The boundary with the Cruse formation is unconformable.
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