Miocene larger benthic foraminifera from the Kalumpang formation in Tawau, Sabah

Junaidi Asis and Basir Jasin (2015) Miocene larger benthic foraminifera from the Kalumpang formation in Tawau, Sabah. Sains Malaysiana, 44 (10). pp. 1397-1405. ISSN 0126-6039

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Abstract

Miocene larger benthic foraminifera have been discovered from a limestone unit of the Kalumpang Formation. The limestone is exposed at the Teck Guan Quarry, Tawau, southeast Sabah. The Kalumpang Formation consists predominantly of interbedded mudstone and sandstone (graywacke), conglomerate, limestone, marl, chert and volcanic rocks. Five limestone samples have been collected and processed for petrographic analysis and identification of larger benthic foraminifera. The limestone is classified as packstone and mudstone. A total of seventeen species of larger benthic foraminifera have been identified. The foraminifera are divided into two assemblages namely Assemblage I and Assemblage II. Assemblage I is characterized by the presence of Lepidocyclina (Nephrolepidina) parva, Operculina sp. and Lepidocyclina (Eulepidina) formosa. This assemblage is an indicative of Aquitanian to Burdigalian in age (Early Miocene). Assembalge II comprises of Lepidocyclina (Nephrolepidina) sumatrensis, Lepidocyclina (Nephrolepidina) angulosa, Lepidocyclina (Nephrolepidina) ferreroi Lepidocyclina sp., Miogypsina sp., Katacycloclypeus annulatus, Katacyloclypeus martini, Cycloclypeus carpenteri, Cycloclypeus indopacificus, Cycloclypeus sp., Flosculinella bontangensis, Operculina complanata, Amphistegina bowdenensis and Amphistegina sp. This assemblage is an indicative of Langhian to Serravallian age (Middle Miocene). The foraminiferal assemblages suggest that the depositional environment was a warm tropical shallow-marine at the fore-reef shelf zone.

Item Type: Article
Keyword: Kalumpang Formation , Larger Benthic Foraminifera , Miocene , Tawau
Subjects: Q Science > QE Geology
Q Science > QR Microbiology
Department: FACULTY > Faculty of Science and Natural Resources
Depositing User: SAFRUDIN BIN DARUN -
Date Deposited: 29 Jun 2021 08:28
Last Modified: 29 Jun 2021 08:28
URI: https://eprints.ums.edu.my/id/eprint/27483

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