Bulletin of the Geological Society of Malaysia, Volume 31, July 1992, pp. 21 – 38
Universiti Malaya, Kuala Lumpur.
Abstract: A reef complex with minor patch reef and mud-mound model is postulated for the Late Jurassic-Early Cretaceous Bau Limestone in the Jagoi-Serikin area. Mudstone, wackestone and packstone representing the back reef area are mostly distributed in close proximity to the landmass, composed of Jagoi Granodiorite. Stromatoporoid-coral-algal boundstone representing ecologic reef with minor packstone, is mainly distributed in the centre of the embayment and farther out on the slope of the basin.
The Jurassic-Cretaceous palaeogeography of the area is modelled as the margin of a landmass, where Gunung Jagoi and Gunung Kisam formed two promontaries bordered by a fringing reef complex on the slope of a rapidly subsiding basin in which the Pedawan Formation was deposited.