Paleogeographical significance of benthic Foraminifera from the Mengkarang formation (early Permian, Sumatera)

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Abstract

Previous investigations of Mengkarang Formation (Sumatera, Indonesia) suggested some paleogeographical interpretation debates. Expedition in the period between 1900 and 1941 concluded that Mengkarang Formation was located in cold environment indicated by cold Gondwanan faunas found in the formation. Afterward, a study in 2013 delivered a warm tropical climate paleogeographical interpretation rather than cold water taxa from the Gondwanan-Perigondwanan region. This current study focused on biostratigraphy analyses supported by detail petrographic analyses to provide additional insight into detail paleogeographical interpretation of Mengkarang formation. A significant amount of smaller benthic foraminifera (Ammonia umbonata, Ammonia beccari, Cibicides tobatulus, and Elphidium sp.) suggested inner to the middle neritic depositional environment. While petrographical analyses suggested that this formation dominated by sub-angular grains of lithic fragment (pyroclastic rock-tuff), feldspar, quartz, and trace of chlorite. Matrix and cement consist of interstitial carbonate, clay, silica, and oxide. The current conclusion from these biostratigraphy and petrography analyses conclude more detail paleogeographical interpretation of Mengkarang Formation. This formation should be deposited in inner to middle neritic marine environment with the source of sediment came from Karing Volcanic Complex thanks to carbonate cementation during the deposition.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
EditorsRatna Yuniati, Terry Mart, Ivandini T. Anggraningrum, Djoko Triyono, Kiki A. Sugeng
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735417410
DOIs
Publication statusPublished - 22 Oct 2018
Event3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017 - Bali, Indonesia
Duration: 26 Jul 201727 Jul 2017

Publication series

NameAIP Conference Proceedings
Volume2023
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Symposium on Current Progress in Mathematics and Sciences 2017, ISCPMS 2017
CountryIndonesia
CityBali
Period26/07/1727/07/17

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