eprintid: 17344 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/01/73/44 datestamp: 2023-12-19 03:23:45 lastmod: 2023-12-19 03:23:45 status_changed: 2023-12-19 03:07:54 type: article metadata_visibility: show creators_name: Lunt, P. title: Field and well evidence for major unconformities in north Sarawak, compared to southwest Sabah, Malaysia ispublished: pub note: cited By 0 abstract: A review of biostratigraphic and lithofacies data is used to show that there is no major unconformity in the stratigraphic record of north Sarawak or southwest Sabah near the end of the Early Miocene (approximately 17-15 Ma). The existence of such an unconformity has been cited in many papers in the past decade and used as a data point in the construction of regional geological hypotheses. Exploration well and outcrop data identifies two major unconformities in SW Sabah (the base and top of Stage III; BMU and DRU; roughly 24 and 13-12 Ma), and in offshore west Sarawak a third unconformity (MMU c. 16 Ma) which fades in effect towards onshore Sarawak. In recent years the names of these distinct unconformities have become conflated as workers had overlooked the origins and definitions of these features. This history is reviewed here in order to clarify future work. © 2022 by the Author(s). date: 2022 publisher: Geological Society of Malaysia official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85143745383&doi=10.7186%2fbgsm74202205&partnerID=40&md5=c6f233f30080eff75ae9d799181ae7a3 id_number: 10.7186/bgsm74202205 full_text_status: none publication: Bulletin of the Geological Society of Malaysia volume: 74 pagerange: 69-83 refereed: TRUE issn: 01266187 citation: Lunt, P. (2022) Field and well evidence for major unconformities in north Sarawak, compared to southwest Sabah, Malaysia. Bulletin of the Geological Society of Malaysia, 74. pp. 69-83. ISSN 01266187