Academic journal article Borneo Research Bulletin

Meor H. Amir Hassan, Howard D. Johnson, Peter A. Allison, Wan Hasiah Abdullah, 2013, Sedimentology and Stratigraphic Development of the Upper Nyalau Formation (Early Miocene), Sarawak, Malaysia: A Mixed Wave- and Tide-Influenced Coastal System

Academic journal article Borneo Research Bulletin

Meor H. Amir Hassan, Howard D. Johnson, Peter A. Allison, Wan Hasiah Abdullah, 2013, Sedimentology and Stratigraphic Development of the Upper Nyalau Formation (Early Miocene), Sarawak, Malaysia: A Mixed Wave- and Tide-Influenced Coastal System

Article excerpt

Meor H. Amir Hassan, Howard D. Johnson, Peter A. Allison, Wan Hasiah Abdullah, 2013, Sedimentology and stratigraphic development of the upper Nyalau Formation (Early Miocene), Sarawak, Malaysia: A mixed wave- and tide-influenced coastal system, Journal of Asian Earth Sciences 76:301-11.

This work presents the first detailed facies analysis of the upper Nyalau Formation exposed around Bintulu, Sarawak, Malaysia. The Lower Miocene Nyalau Formation exposures in NW Sarawak represent one of the closest sedimentological outcrop analogues to the age equivalent, hydrocarbon-bearing, offshore deposits of the Balingian Province. Nine types of facies associations are recognised in the Nyalau Formation, which form elements of larger-scale facies successions. Wave-dominated shoreface facies successions display coarsening upward trends from Offshore, into Lower Shoreface and Upper Shoreface Facies Associations. Fluvio-tidal channel facies successions consist of multi-storey stacks of Fluvial-Dominated, Tide-Influenced and Tide-Dominated Channel Facies Associations interbedded with minor Bay and Mangrove Facies Associations. Estuarine bay facies successions are composed of Tidal Bar and Bay Facies Associations with minor Mangrove Facies Associations. Tide-dominated delta facies successions coarsen upward from an Offshore into the Tidal Bar Facies Association. …

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