Bulletin of the Geological Society of Malaysia, Volume 13, Dec. 1980, pp. 1 – 26
1Department of Geology, University of Malaya, Kuala Lumpur 22-11, Malaysia
2Department of Geology, University of Nottingham, University Park, Nottingham NG7 2RD, England
3Department of Geology, University of Calgary, Calgary, Alberta, Canada, T2N IN4
Abstract: A new lithostratigraphic subdivision for the Carboniferous sediments of the Panching area, Pahang is proposed as follows; Charu Formation (Viséan-basal Namurian), Panching Limestone (Namurian A) and Sagor Formation (?Late Carboniferous). These three formations are defined as constituting the Kuantan Group.
The Charu Formation consists predominantly of interbedded sandstones, siltstones and shales. Brachiopods, found abundantly at a number of localities indicate the formation is of Viséan-basal Namurian age. The sedimentary features and fossil assemblage suggest the formation was deposited in a shallow marine near shore environment.
The Panching Limestone consists of biomicrites, biosparites, biosparudites, oomicrites and recrystallised micrites. It contains a very rich macro- and microfauna which indicates a Namurian A age. The limestone is interpreted to have formed in a warm shallow marine reefal environment. Five penecontemporaneous facies are recognisable in the limestone: micritic facies, biomicrite facies, crinoidal facies, biosparite facies and carbonaceous limestone facies. The overall fauna of the formation represents a reefal pre-climax community. A new species of heterocoral, Hexaphyllia concavia sp. nov. is described from the Panching Limestone.
The Sagor Formation is a sequence of conglomerate, sandstone, shale, mudstone and radiolarian mudstone, with rare limestone lenses, deposited in a relatively shallow marine environment. The precise age of the formation is not known but is interpreted to be Late Carboniferous.