Sue O'Connor

Pelagic Fishing at 42,000 Years Before the Present and the Maritime Skills of Modern Humans

Abundant fish remains from a shelter in East Timor imply that humans were fishing the deep sea by 43,000 years ago. By 50,000 years ago, it is clear that modern humans were capable of long-distance sea travel as they colonized Australia. However, evidence for advanced maritime skills, and for fishing in particular, is rare before the terminal Pleistocene/early Holocene. Here we report remains of a variety of pelagic and other fish species dating to 42,000 years before the present from Jerimalai shelter in East Timor, as well as the earliest definite evidence for fishhook manufacture in the world. Capturing pelagic fish such as tuna requires high levels of planning and complex maritime technology. The evidence implies that the inhabitants were fishing in the deep sea.

New evidence from East Timor contributes to our understanding of earliest modern human colonisation east of the sunda shelf

New dates by which modern humans reached East Timor prompts this very useful update of the colonisation of Island Southeast Asia. The author addresses all the difficult questions: why are the dates for modern humans in Australia earlier than they are in Island Southeast Asia? Which route did they use to get there? If they used the southern route, why or how did they manage to bypass Flores, where Homo floresiensis , the famous non- sapiens hominin known to the world as the ‘hobbit’ was already in residence? New work at the rock shelter of Jerimalai suggests some answers and new research directions.

Excavation at Lene Hara Cave establishes occupation in East Timor at least 30,000-35,000 years ago

Reinvestigations of the cave of Lene Hara in East Timor have yielded new dating evidence showing occupation from before 30,000 BP. These will further fuel the debates on early colonization of the region.

Serpent's Glen Rockshelter: Report of the first Pleistocene-aged occupation sequence from the Western Desert

In this paper we present the initial report for the first Pleistocene occupation sequence to be excavated in the Western Desert of Australia, from the site of Serpents Glen. We identify a three phase sequence with an earliest unit dating to before 23,500 BP, an intermediate unit comprising culturally sterile sediments and an upper unit dating to less than 4700 BP. Previous excavations within the Western Desert have only provided Holocene assemblages (Gould 1977; Smith 1988; Veth 1993). Indeed, the majority of these sites have been dated to the mid to late Holocene.

Cave Archaeology and Sampling Issues in the Tropics: A Case Study from Lene Hara Cave, a 42,000 Year Old Occupation Site in East Timor, Island Southeast Asia

Abstract New evidence from Lene Hara Cave, East Timor, demonstrates that it was first occupied by modern humans by 42,454±450 cal BP at approximately the same time as nearby Jerimalai shelter. Together these sites constitute the earliest evidence for modern human colonisation of Island Southeast Asia east of the Sunda Shelf. Here we report on the dating and stratigraphy from the 2000 and 2002 test excavations at Lene Hara, as well as new dates obtained by sampling breccia deposits in 2009. The post-2000 excavations and sampling demonstrate that different areas of the cave preserve different sedimentary sequences and necessitate a revision of our earlier interpretations of the occupation history of the cave. At Lene Hara, and other caves with complex depositional histories in tropical regions, the occupation sequence will only be revealed through integrating information from extensive areal sampling. When calibrated, the early dates from East Timor now align closer to the oldest evidence for occupation in northern Australia, with substantial implications for current theories on the colonisation of this region by modern humans. The Nusa Tenggara (Lesser Sunda) island chain emerges as a likely passage for modern human entry into Greater Australia. In view of the short water crossings required to reach Flores from Timor, the apparent absence of modern humans on Flores prior to the Holocene appears highly anomalous.

Continuity in Tropical Cave Use: Examples from East Timor and the Aru Islands, Maluku

The Aru Islands and East Timor fall within the biogeographic region known as Wallacea and have lain within the tropics for the known history of human occupation. Recent research has identified archaeological sequences that parallel the older radiocarbon chronologies from Australia. Terminal Pleistocene huntergatherer assemblages recovered from at least six caves register the introduction of a Neolithic technocomplex after ca. 4000 B.P. in the form of pottery, domesticates, ovens, the industrial use of shell, and some endemic extinctions. However, there are also intriguing uniformities in the cultural assemblages: in the suites of artifacts discarded and assumed supply zones for those artifacts, in the economic faunal suites, and in the apparent level of intensity of occupation of the different sites. We concur with and extend the argument made by Glover (1986) that there was no substantial change in the nature of cave use in East Timor despite the possible subsistence changes that might have taken place. Their remarkable continuities reflect their similar placement within larger regional land-use systems through time: they represent diverse components of a larger domestic and totemic landscape, which appears to continue to this day. The scale of territoriality, degree of mobility, and extent of trade and exchange of groups must all be considered if the placement of caves within cultural landscapes is to be understood.

Pre-Bomb Marine Reservoir Variability in the Kimberley Region, Western Australia

New ΔR values are presented for 10 known-age shells from the Kimberley region of northwest Australia. Previous estimates of ΔR for the Kimberley region are based on only 6 individual shell specimens with dates of live collection known only to within 50 yr (Bowman 1985a). Here, we describe the results of our recent attempts to constrain ΔR variability for this region by dating a suite of known-age pre-AD 1950 shell samples from the Australian Museum and Museum Victoria. A regional ΔR of 58 ± 17 14C yr for open waters between Broome and Cape Leveque is recommended based on 7 of these specimens. The criteria used to select shells for dating and inclusion in the regional mean are discussed.

Towards an accurate and precise chronology for the colonization of Australia: The example of Riwi, Kimberley, Western Australia

An extensive series of 44 radiocarbon (14C) and 37 optically stimulated luminescence (OSL) ages have been obtained from the site of Riwi, south central Kimberley (NW Australia). As one of the earliest known Pleistocene sites in Australia, with archaeologically sterile sediment beneath deposits containing occupation, the chronology of the site is important in renewed debates surrounding the colonization of Sahul. Charcoal is preserved throughout the sequence and within multiple discrete hearth features. Prior to 14C dating, charcoal has been pretreated with both acid-base-acid (ABA) and acid base oxidation-stepped combustion (ABOx-SC) methods at multiple laboratories. Ages are consistent between laboratories and also between the two pretreatment methods, suggesting that contamination is easily removed from charcoal at Riwi and the Pleistocene ages are likely to be accurate. Whilst some charcoal samples recovered from outside hearth features are identified as outliers within a Bayesian model, all ages on charcoal within hearth features are consistent with stratigraphy. OSL dating has been undertaken using single quartz grains from the sandy matrix. The majority of samples show De distributions that are well-bleached but that also include evidence for mixing as a result of post-depositional bioturbation of the sediment. The results of the two techniques are compared and evaluated within a Bayesian model. Consistency between the two methods is good, and we demonstrate human occupation at this site from 46.4–44.6 cal kBP (95.4% probability range). Importantly, the lowest archaeological horizon at Riwi is underlain by sterile sediments which have been dated by OSL making it possible to demonstrate the absence of human occupation for between 0.9–5.2 ka (68.2% probability range) prior to occupation.

Occupation at carpenters gap 3, windjana gorge, kimberley, Western Australia

Abstract Carpenters Gap 3 (CG3), a limestone cave and shelter complex in the Napier Range, Western Australia, was occupied by Aboriginal people intermittently from over 30,000 years ago through to the historic period. Excavations at CG3 provide only slight evidence for occupation following first settlement in the late Pleistocene. Analysis of the radiocarbon dates indicates that following this there was a hiatus in occupation during the Last Glacial Maximum. In common with most Australian sites, the evidence for occupation increases sharply from the mid-Holocene. Faunal remains, interpreted predominantly as the remains of people’s meals, all suggest foraging of the immediate surroundings throughout the entire period of occupation. Fragments of baler shell and scaphopod beads are present from the early Holocene, suggesting movement of high value goods from the coast (over 200 km distant). Flakes from edge-ground axes recovered from occupation units dated to approximately 33,000 cal. BP, when overall artefact numbers are low, suggest that these tools formed an important component of the lithic repertoire at this time.

Indo-Pacific Migration and Colonization—Introduction

In this Introduction we comment on issues raised by the present collection of papers as they appear relevant in thinking about the settlement of the Indo-Pacific from the Pleistocene to the late Holocene. Successful maritime migration across this vast region was obviously related to voyaging technology and colonizing behaviors. Here we critique earlier models that indicate simple unidirectional expansion and posit farming, or indeed any other single driver, for maritime expansion in the mid–late Holocene. It now appears that the development of interaction spheres in Wallacea, and perhaps connections with New Guinea, have contributed significantly to late Holocene societies in ISEA and Island Melanesia. Even in Remote Oceania where long-term colonizing success was dependent on a transported tropical horticultural complex, initial settlement strategies are likely to have been highly varied and to have had variable success. Nor is migration restricted to the founding events of island settlement; rather, it continued as a significant component of the formation and re-formation of island cultures up to the historical era and, of course, within the present day. Like the authors represented here we suggest that if we wish to make progress in understanding the motives, sources, mechanisms and results of colonizing migration, there will be greatest reward in exploring the complexity and variability that lie behind it.