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All Journal Geosfera: Jurnal Penelitian Geografi
Edy Sutriyono
Program Studi Teknik Geologi, Fakultas Teknik, Universitas Sriwijaya
Earth & Planetary Sciences Education Environmental Science Social Sciences

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Analisis Paleontologi dan Petrografi sebagai Interpretasi Limgkungan Pengendapan Anggota Sukaraja Formasi Bentang Charyssya Safira Puteri Yunizar; Edy Sutriyono; Ugi Kurnia Gusti
Geosfera: Jurnal Penelitian Geografi Vol 5, No 1 (2026): Geosfera : Jurnal Penelitian Geografi
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/geojpg.v4i2.38038

Abstract

Depositional environment is an important aspect of sedimentary geology because it records paleoenvironmental conditions and sedimentation processes during rock formation. However, integrated paleontological and petrographic studies on the Sukaraja Member of the Bentang Formation remain limited. This study aims to interpret the depositional environment of the Sukaraja Member based on paleontological and petrographic analyses. The research was conducted through field observations, rock sampling, micropaleontological analysis, and petrographic examination using thin sections under a polarizing microscope. The results indicate that the Sukaraja Member is composed of sandy limestone characterized by packstone texture, micrite matrix, and parallel bedding structures, reflecting low to moderate depositional energy. Micropaleontological analysis indicates a Late Miocene age (N16 zone), while benthic foraminiferal assemblages suggest a marginal to middle neritic environment with estimated depths ranging from 118 to 182 m. The integration of petrographic characteristics, sedimentary structures, and fossil assemblages indicates that the Sukaraja Member of the Bentang Formation was deposited in a back reef carbonate environment characterized by relatively calm water conditions and limited clastic sediment supply.
Co-Authors Charyssya Safira Puteri Yunizar Ugi Kurnia Gusti