Berita Sedimentologi
Vol 47, No 3 (2021)

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 (Department of Earth and Atmospheric Sciences, University of Alberta)
Yahdi Zaim (Department of Geology, Institut Teknologi Bandung)
Yan Rizal (Department of Geology, Institut Teknologi Bandung)
Aswan Aswan (Department of Geology, Institut Teknologi Bandung)
Anne Fortuin (Geomarine Centre, Amsterdam)
Roy Larick (Bluestone Heights, Shore Cultural Centre, Ohio)
Russell L. Ciochon (Department of Anthropology, University of Iowa)



Article Info

Publish Date
28 Dec 2021

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.

Copyrights © 2021






Journal Info

Abbrev

FOSI

Publisher

Subject

Earth & Planetary Sciences

Description

BERITA SEDIMENTOLOGI aims to disseminate knowledge on the field of sedimentary geology to its readers. The journal welcomes contributions in the form of original research articles, review articles, short communications and discussions and replies. Occasionally, Berita Sedimentologi also includes ...