Title

An integrative geochronological framework for the pleistocene So'a basin (Flores, Indonesia), and its implications for faunal turnover and hominin arrival

Authors

Gerrit D. van den Bergh, Faculty of Science, Medicine and Health
Brent V. Alloway, Faculty of Science, Medicine and Health
Michael Storey, Statens Naturhistoriske Museum
Ruly Setiawan, Faculty of Science, Medicine and Health
Dida Yurnaldi, Faculty of Science, Medicine and Health
Iwan Kurniawan, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Mark W. Moore, University of New England Australia
Jatmiko, Organisasi Riset Arkeologi
Adam Brumm, Faculty of Science, Medicine and Health
Stephanie Flude, Statens Naturhistoriske Museum
Thomas Sutikna, Faculty of Science, Medicine and Health
Erick Setiyabudi, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Unggul W. Prasetyo, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Mika R. Puspaningrum, Faculty of Science, Medicine and Health
Ifan Yoga, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Halmi Insani, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Hanneke J.M. Meijer, Universitetet i Bergen
Barry Kohn, University of Melbourne
Brad Pillans, The Australian National University
Indra Sutisna, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Anthony Dosseto, Faculty of Science, Medicine and Health
Susan Hayes, Faculty of Science, Medicine and Health
John A. Westgate, University of Toronto
Nick J.G. Pearce, Aberystwyth University
Fachroel Aziz, Departemen Energi dan Sumber Daya Mineral Republic of Indonesia
Rokus Awe Due, Pusat Penelitian Arkeologi Nasional
Michael J. Morwood, Faculty of Science, Medicine and Health

Publication Name

Quaternary Science Reviews

Abstract

Flores represents a unique insular environment with an extensive record of Pleistocene fossil remains and stone artefacts. In the So'a Basin of central Flores these include endemic Stegodon, Komodo dragons, giant tortoises, rats, birds and hominins, and lithic artefacts that can be traced back to at least one million years ago (1 Ma). This comprehensive review presents important new data regarding the dating and faunal sequence of the So'a Basin, including the site of Mata Menge where Homo floresiensis-like fossils dating to approximately 0.7 Ma were discovered in 2014. By chemical fingerprinting key silicic tephra originating from local and distal eruptive sources we have now established basin-wide tephrostratigraphic correlations, and, together with new numerical ages, present an update of the chronostratigraphy of the So'a Basin, with major implications for the faunal sequence. These results show that a giant tortoise and the diminutive proboscidean Stegodon sondaari last occurred at the site of Tangi Talo ∼1.3 Ma, and not 0.9 Ma as previously thought. We also present new data suggesting that the disappearance of giant tortoise and S. sondaari from the sedimentary record occurred before, and/or was coincident with, the earliest hominin arrival, as evidenced by the first records of lithic artefacts occurring directly below the 1 Ma Wolo Sege Tephra. Artefacts become common in the younger layers, associated with a distinct fauna characterized by the medium-sized Stegodon florensis and giant rat Hooijeromys nusatenggara. Furthermore, we describe a newly discovered terrace fill, which extends the faunal record of Stegodon in the So'a Basin to the Late Pleistocene. Our evidence also suggests that the paleoenvironment of the So'a Basin became drier around the time of the observed faunal transition and arrival of hominins on the island, which could be related to an astronomically-forced climate response at the onset of the Mid-Pleistocene Transition (MPT; ∼1.25 Ma) leading to increased aridity and monsoonal intensity.

Open Access Status

This publication may be available as open access

Volume

294

Article Number

107721

Funding Number

0107/SIP/FRP/SM/VI/2010

Funding Sponsor

Villum Fonden

Share

COinS
 

Link to publisher version (DOI)

http://dx.doi.org/10.1016/j.quascirev.2022.107721