dc.contributor.author | Indriati, Etty | |
dc.contributor.author | Swisher, Carl C | |
dc.contributor.author | Lepre, Christopher | |
dc.contributor.author | Quinn, Rhonda L | |
dc.contributor.author | Suriyanto, Rusyad A | |
dc.contributor.author | Hascaryo, Agus T | |
dc.contributor.author | Gruen, Rainer | |
dc.contributor.author | Feibel, Craig S | |
dc.contributor.author | Pobiner, Briana L | |
dc.contributor.author | Aubert, Maxime | |
dc.contributor.author | Lees, Wendy | |
dc.contributor.author | Anton, Susan C | |
dc.date.accessioned | 2018-01-12T00:35:18Z | |
dc.date.available | 2018-01-12T00:35:18Z | |
dc.date.issued | 2011 | |
dc.date.modified | 2014-07-21T05:09:06Z | |
dc.identifier.issn | 1932-6203 | |
dc.identifier.doi | 10.1371/journal.pone.0021562 | |
dc.identifier.uri | http://hdl.handle.net/10072/61401 | |
dc.description.abstract | Homo erectus was the first human lineage to disperse widely throughout the Old World, the only hominin in Asia through
much of the Pleistocene, and was likely ancestral to H. sapiens. The demise of this taxon remains obscure because of
uncertainties regarding the geological age of its youngest populations. In 1996, some of us co-published electron spin
resonance (ESR) and uranium series (U-series) results indicating an age as young as 35–50 ka for the late H. erectus sites of
Ngandong and Sambungmacan and the faunal site of Jigar (Indonesia). If correct, these ages favor an African origin for
recent humans who would overlap with H. erectus in time and space. Here, we report 40Ar/39Ar incremental heating analyses
and new ESR/U-series age estimates from the ‘‘20 m terrace’’ at Ngandong and Jigar. Both data sets are internally consistent
and provide no evidence for reworking, yet they are inconsistent with one another. The 40Ar/39Ar analyses give an average
age of 546612 ka (sd65 se) for both sites, the first reliable radiometric indications of a middle Pleistocene component for
the terrace. Given the technical accuracy and consistency of the analyses, the argon ages represent either the actual age or
the maximum age for the terrace and are significantly older than previous estimates. Most of the ESR/U-series results are
older as well, but the oldest that meets all modeling criteria is 143 ka+20/217. Most samples indicated leaching of uranium
and likely represent either the actual or the minimum age of the terrace. Given known sources of error, the U-series results
could be consistent with a middle Pleistocene age. However, the ESR and 40Ar/39Ar ages preclude one another. Regardless,
the age of the sites and hominins is at least bracketed between these estimates and is older than currently accepted. | |
dc.description.peerreviewed | Yes | |
dc.description.publicationstatus | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Public Library of Science | |
dc.publisher.place | United States | |
dc.relation.ispartofstudentpublication | N | |
dc.relation.ispartofpagefrom | e21562-1 | |
dc.relation.ispartofpageto | e21562-10 | |
dc.relation.ispartofissue | 6 | |
dc.relation.ispartofjournal | PloS One | |
dc.relation.ispartofvolume | 6 | |
dc.rights.retention | Y | |
dc.subject.fieldofresearch | Archaeological science | |
dc.subject.fieldofresearch | Archaeology of Asia, Africa and the Americas | |
dc.subject.fieldofresearchcode | 430101 | |
dc.subject.fieldofresearchcode | 430102 | |
dc.title | The Age of the 20 Meter Solo River Terrace, Java, Indonesia and the Survival of Homo erectus in Asia | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
dcterms.license | https://creativecommons.org/licenses/by/4.0/ | |
dc.description.version | Version of Record (VoR) | |
gro.rights.copyright | © 2011 Indriati et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits
unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. | |
gro.hasfulltext | Full Text | |
gro.griffith.author | Aubert, Maxime | |