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All Journal Berita Sedimentologi
John-Paul Zonneveld
Department of Earth and Atmospheric Sciences, University of Alberta
Earth & Planetary Sciences

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The Palaeo-Kambaniru river mouth, Sumba, East Nusa Tenggara, Indonesia: A record of strongly seasonal catastrophic flow in a monsoon-controlled deltaic complex John-Paul Zonneveld; Yahdi Zaim; Yan Rizal; Aswan Aswan; Anne Fortuin; Roy Larick; Russell L. Ciochon
Berita Sedimentologi Vol 47, No 3 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1088.021 KB) | DOI: 10.51835/bsed.2021.47.3.360

Abstract

The Kambaniru River valley near the city of Waingapu preserves a thick succession of coarse-grained fluvial-deltaic sediment deposited during the Late Pleistocene. This succession incises through a thick uplifted coral reef terrace succession and records intervals of highly episodic flow events during the last glacial interval. The occurrence of intraclastic, coarse sand/gravel matrix olistostromes in several areas attests to the occasionally catastrophic nature of flow in the ancestral Kambaniru River. Small to moderate-sized coral-rich reefs and laterally restricted reef terraces occur on delta-front conglomerate successions at multiple horizons through the study interval. These reefs record both intervals of low flow as well as periodic river-mouth avulsion episodes. Comparison of radiometric dates obtained from pelecypod and coral material from both deltaic successions and laterally adjacent coral reef terrace intervals indicates that uplift/subsidence history of the terraces differs from that of the valley and that correlation between the two should be taken with care.
Co-Authors Anne Fortuin Aswan Aswan Roy Larick Russell L. Ciochon Yahdi Zaim Yan Rizal