Fluctuating local mobility from the end of the Pleistocene to the end of the Holocene on the north coast of New Guinea

Ceri Shipton; Emily Nutman; Phoebe Barnes; Shimona Kealy; Loretta Hasu; John Sepe; Sue O'Connor

doi:10.70460/jpa.v16i1.392

Authors

Ceri Shipton Australian National University https://orcid.org/0000-0002-4224-9467
Emily Nutman Australian National University https://orcid.org/0000-0002-8912-7811
Phoebe Barnes Australian National University https://orcid.org/0009-0006-2761-8160
Shimona Kealy Australian National University https://orcid.org/0000-0002-0646-1313
Loretta Hasu Otago University https://orcid.org/0009-0007-8670-0516
John Sepe ERIAS Group https://orcid.org/0009-0007-2079-5495
Sue O'Connor Australian National University https://orcid.org/0000-0001-9381-078X

DOI:

https://doi.org/10.70460/jpa.v16i1.392

Keywords:

Watinglo, lithics, obsidian sourcing, linguistic diversity, Papua New Guinea

Abstract

The Watinglo rockshelter provides an occupation record from the central north coast of New Guinea from 13 ka to the last few hundred years, with a hiatus in the later Holocene. Examination of the lithic artefacts from this sequence suggests that within a paradigm of technological continuity and local resource procurement, there were notable fluctuations in the use of particular materials and the intensity with which the site was used. This suggests a pattern of small range size and population fragmentation that may have contributed to the unparalleled linguistic diversity of the wider region.

References

Allen, J., Gosden, C., & White, J. P. (1989). Human Pleistocene adaptations in the tropical island Pacific: recent evidence from New Ireland, a Greater Australian outlier. Antiquity, 63(240), 548-561. DOI: https://doi.org/10.1017/S0003598X00076547 DOI: https://doi.org/10.1017/S0003598X00076547

Beaumont, P., O'Connor, S., Leclerc, M., & Aplin, K. (2019). Diversity in Early New Guinea pottery traditions: north coast ceramics from Lachitu, Taora, Watinglo and Paleflatu. Journal of Pacific Archaeology, 10(1), 15-32. DOI: https://doi.org/10.70460/jpa.v10i1.268 DOI: https://doi.org/10.70460/jpa.v10i1.268

Bellwood, P., Irwin, G., & Tanudirjo, D. (2019). Lithic and other non-ceramic artefacts. In P. Bellwood (Ed.), The Spice Islands in Prehistory: Archaeology in the Northern Moluccas, Indonesia (pp. 107-120). The Australian National University. DOI: https://doi.org/10.22459/TA50.2019.08

Bickler, S. H., & Turner, M. (2002). Food to stone: investigations at the Suloga adze manufacturing sites, Woodlark Island, Papua New Guinea. The Journal of the Polynesian Society, 111(1), 11-43.

Bronk Ramsey, C. (2021). OxCal v4.4.4. In https://c14.arch.ox.ac.uk/oxcal. html

Bulbeck, D., & O’Connor, S. (2011). The Watinglo mandible: A second terminal Pleistocene Homo sapiens fossil from tropical Sahul with a test on existing models for the human settlement of the region. Homo, 62(1), 1-29. DOI: https://doi.org/10.1016/j.jchb.2010.10.002 DOI: https://doi.org/10.1016/j.jchb.2010.10.002

Bulmer, S. (2005). Reflections in stone: axes and the beginnings of agriculture in the Central Highlands of New Guinea. In A. Pawley, R. Attenborough, J. Golson, & R. Hide (Eds.), Papuan Pasts: cultural, linguistic and biological histories of Papuan-speaking peoples (pp. 387-450). The Australian National University.

Centi, L., & Zaidner, Y. (2022). Variations in lithic artefact density as a tool for better understanding Middle Palaeolithic human behaviour: The case of Nesher Ramla (Israel). Quaternary International, 624, 4-18. DOI: https://doi.org/10.1016/j.quaint.2020.03.025 DOI: https://doi.org/10.1016/j.quaint.2020.03.025

Chappell, J., Ota, Y., & Berryman, K. (1996). Late Quaternary coseismic uplift history of Huon Peninsula, Papua New Guinea. Quaternary Science Reviews, 15(1), 7-22. DOI: https://doi.org/10.1016/0277-3791(95)00062-3 DOI: https://doi.org/10.1016/0277-3791(95)00062-3

Clark, G., & Barton, C. M. (2017). Lithics, landscapes & la Longue-durée–Curation & expediency as expressions of forager mobility. Quaternary International, 450, 137-149. DOI: https://doi.org/10.1016/j.quaint.2016.08.002 DOI: https://doi.org/10.1016/j.quaint.2016.08.002

Clarkson, C. (2013). Measuring core reduction using 3D flake scar density: A test case of changing core reduction at Klasies River Mouth, South Africa. Journal of Archaeological Science, 40, 4348-4357. DOI: https://doi.org/10.1016/j.jas.2013.06.007 DOI: https://doi.org/10.1016/j.jas.2013.06.007

Clarkson, C., Shipton, C., & Weisler, M. (2015). Front, back and sides: experimental replication and archaeological analysis of Hawaiian adzes and associated debitage. Archaeology in Oceania, 50(2), 71-84. DOI: https://doi.org/10.1002/arco.5056 DOI: https://doi.org/10.1002/arco.5056

Denham, T. (2004). The roots of agriculture and arboriculture in New Guinea: looking beyond Austronesian expansion, Neolithic packages and indigenous origins. World Archaeology, 36(4), 610-620. DOI: https://doi.org/10.1080/0043824042000303791 DOI: https://doi.org/10.1080/0043824042000303791

Denham, T. (2005). Envisaging early agriculture in the Highlands of New Guinea: landscapes, plants and practices. World Archaeology, 37(2), 290-306. DOI: https://doi.org/10.1080/00438240500095447 DOI: https://doi.org/10.1080/00438240500095447

Diamond, J. (2013). The World until Yesterday: What can we learn from traditional societies? Penguin.

Donohue, M. (2002). Which sounds change: Descent and borrowing in the Skou family. Oceanic Linguistics, 41, 171-221. DOI: https://doi.org/10.2307/3623332 DOI: https://doi.org/10.1353/ol.2002.0018

Donohue, M. (2003). The tonal system of Skou, New Guinea. In Kaji, S. (ed.) Proceedings of the symposium: Cross-linguistic studies of tonal phenomena: historical developments, phonetics of tone, and descriptive studies (pp. 329-364). Research Institute for Language and Cultures of Asia and Africa, Tokyo University of Foreign Studies.

Dwyer, P. D. (1983). Etolo hunting performance and energetics. Human Ecology, 11(2), 145-174. DOI: https://doi.org/10.1007/BF00891741

Evans, B. (2000). A technological evaluation of the chipped stone assemblage from Nombe, Papua New Guinea. PhD thesis, Australian National University.

Fairbairn, A. (2005). An archaeobotanical perspective on Holocene plant-use practices in lowland northern New Guinea. World Archaeology, 37(4), 487-502. DOI: https://doi.org/10.1080/00438240500395748 DOI: https://doi.org/10.1080/00438240500395748

Field, J. H., Summerhayes, G. R., Luu, S., Coster, A. C., Ford, A., Mandui, H., Fullagar, R., Hayes, E., Leavesley, M., & Lovave, M. (2020). Functional studies of flaked and ground stone artefacts reveal starchy tree nut and root exploitation in mid-Holocene highland New Guinea. The Holocene, 30(9), 1360-1374. DOI: https://doi.org/10.1177/0959683620919983 DOI: https://doi.org/10.1177/0959683620919983

Foley, W. A. (2000). The languages of New Guinea. Annual Review of Anthropology, 29(1), 357-404. DOI: https://doi.org/10.1146/annurev.anthro.29.1.357 DOI: https://doi.org/10.1146/annurev.anthro.29.1.357

Foley, W. A. (2018a). The languages of northwest New Guinea. In B. Palmer (Ed.), The Languages and Linguistics of the New Guinea Area: A comprehensive guide (pp. 433-568). De Gruyter Mouton. DOI: https://doi.org/10.1515/9783110295252-004

Foley, W. A. (2018b). The Languages of the Sepik-Ramu Basin and environs. In B. Palmer (Ed.), The Languages and Linguistics of the New Guinea Area: A comprehensive guide (Vol. 4, pp. 197-432). De Gruyter Mouton. DOI: https://doi.org/10.1515/9783110295252-003

Ford, A. (2017). Late Pleistocene lithic technology in the Ivane valley: A view from the rainforest. Quaternary International, 448, 31-43. DOI: https://doi.org/10.1016/j.quaint.2016.05.030 DOI: https://doi.org/10.1016/j.quaint.2016.05.030

Ford, A., & Hiscock, P. (2024). Axe Quarrying, Production, and Exchange in Australia and New Guinea. In I. J. McNiven & B. David (Eds.), The Oxford Handbook of the Archaeology of Indigenous Australia and New Guinea (pp. 641-667). Oxford University Press. DOI: 10.1093/oxfordhb/9780190095611.001.0001 DOI: https://doi.org/10.1093/oxfordhb/9780190095611.013.22

Forestier, H., Kariwiga, J., Baills, H., Tsang, R., Puaud, S., Miampa, K., Plutniak, S., Kuaso, A., Ricaut, F.-X., & Leavesley, M. (2020). 30 years after P. Gorecki and D.S. Gillieson in Papua New Guinea: New Data on the Holocene Settlement of East Sepik, Upper Karawari-Arafundi Region. Advancing Southeast Asian Archaeology 2019, 184-200.

Frahm, E., Kandel, A. W., & Gasparyan, B. (2019). Upper Palaeolithic settlement and mobility in the Armenian highlands: agent-based modeling, obsidian sourcing, and lithic analysis at Aghitu-3 Cave. Journal of Paleolithic Archaeology, 2(4), 418-465. DOI: https://doi.org/10.1007/s41982-019-00025-5 DOI: https://doi.org/10.1007/s41982-019-00025-5

Fredericksen, C., Spriggs, M., & Ambrose, W. (1993). Pamwak rockshelter: a Pleistocene site on Manus Island, Papua New Guinea. In M. A. Smith, M. Spriggs, & B. L. Fankhauser (Eds.), Sahul in Review: Pleistocene Archaeology in Australia, New Guinea and Island Melanesia (Vol. 24, pp. 144-154). Australian National University.

Fuentes, R., Ono, R., Carlos, J., Kerfant, C., Miranda, T., Aziz, N., Sofian, H. O., & Pawlik, A. (2020). Stuck within notches: Direct evidence of plant processing during the last glacial maximum to Holocene in North Sulawesi. Journal of Archaeological Science: Reports, 30, 102207. DOI: https://doi.org/10.1016/j.jasrep.2020.102207 DOI: https://doi.org/10.1016/j.jasrep.2020.102207

Fullagar, R., Field, J., Denham, T., & Lentfer, C. (2006). Early and mid Holocene tool-use and processing of taro (Colocasia esculenta), yam (Dioscorea sp.) and other plants at Kuk Swamp in the highlands of Papua New Guinea. Journal of Archaeological Science, 33(5), 595-614. DOI: https://doi.org/10.1016/j.jas.2005.07.020 DOI: https://doi.org/10.1016/j.jas.2005.07.020

Fyfe, A., & Bolton, J. (2011). An analysis of arrow and string bag craft variability in the upper Sepik and central new Guinea. Oceania, 81(3), 259-279. DOI: https://doi.org/10.1002/j.1834-4461.2011.tb00107.x DOI: https://doi.org/10.1002/j.1834-4461.2011.tb00107.x

Gaffney, D., & Summerhayes, G. R. (2019). Coastal mobility and lithic supply lines in northeast New Guinea. Archaeological and Anthropological Sciences, 11, 2849-2878. DOI: https://doi.org/10.1007/s12520-018-0713-8 DOI: https://doi.org/10.1007/s12520-018-0713-8

Golitko, M., Power, M. J., Kariwiga, J., & Miamba, K. (2024). Waking the “sleeping giant?” Mid-to Late-Holocene environment and fire history in the Aitape area, northern Papua New Guinea. The Holocene, 34(12), 1852-1864. DOI: https://doi.org/10.1177/09596836241274989 DOI: https://doi.org/10.1177/09596836241274989

Golitko, M., Schauer, M., & Terrell, J. E. (2013). Obsidian acquisition on the Sepik coast of northern Papua New Guinea during the last two Millennia. University of Otago Studies in Archaeology 25, 43-57.

Gorecki, P. P., & Gillieson, D. S. (1989). A Crack in the Spine: Prehistory and ecology of the Jimi-Yuat Valley, Papua New Guinea. James Cook University of North Queensland.

Hampton, O. (1999). Culture of Stone: Sacred and profane uses of stone among the Dani. Texas A&M University Press.

Heaton, T. J., Köhler, P., Butzin, M., Bard, E., Reimer, R. W., Austin, W. E., Bronk Ramsey, C., Grootes, P. M., Hughen, K. A., & Kromer, B. (2020). Marine20—the marine radiocarbon age calibration curve (0–55,000 cal BP). Radiocarbon, 62(4), 779-820. DOI: https://doi.org/10.1017/RDC.2020.68 DOI: https://doi.org/10.1017/RDC.2020.68

Hertell, E., & Tallavaara, M. (2011). High mobility or gift exchange–early Mesolithic exotic chipped lithics in Southern Finland. In Rankama, T. (ed.) Mesolithic Interfaces: Variability in Lithic Technologies in Eastern Fennoscandia (pp. 11-41). Archaeological Society of Finland.

Hogg, A. G., Heaton, T. J., Hua, Q., Palmer, J. G., Turney, C. S., Southon, J., Bayliss, A., Blackwell, P. G., Boswijk, G., & Bronk Ramsey, C. (2020). SHCal20 Southern Hemisphere calibration, 0–55,000 years cal BP. Radiocarbon, 62(4), 759-778. DOI: https://doi.org/10.1017/RDC.2020.59 DOI: https://doi.org/10.1017/RDC.2020.59

Hope, G., & Tulip, J. (1994). A long vegetation history from lowland Irian Jaya, Indonesia. Palaeogeography, Palaeoclimatology, Palaeoecology, 109(2-4), 385-398. DOI: https://doi.org/10.1016/0031-0182(94)90187-2 DOI: https://doi.org/10.1016/0031-0182(94)90187-2

Huff, J. (2016). Understanding changes in mobility & subsistence from terminal Pleistocene to Late Holocene in the highlands of New Guinea through intensity of lithic reduction, changing site types, and paleoclimate. PhD thesis, University of Washington.

Hutchinson, D., & Norvick, M. (1974). Wewak. Hobart, Australia, Bureau of Mineral Resources, Geology and Geophysics, Department of National Development in conjunction with the Geological Survey of Papua New Guinea, Office of Minerals and Energy, Department of Natural Resources.

Kaharudin, H. A. F. (2023). Holocene Crab Consumption at Watinglo, Papua New Guinea. KALPATARU, 32(2), 97-118. DOI: https://doi.org/10.55981/kpt.2023.94 DOI: https://doi.org/10.55981/kpt.2023.94

Kennedy, J. (2012). Agricultural systems in the tropical forest: a critique framed by tree crops of Papua New Guinea. Quaternary International, 249, 140-150. DOI: https://doi.org/10.1016/j.quaint.2011.06.020 DOI: https://doi.org/10.1016/j.quaint.2011.06.020

Kerby, G., Ford, A., Summerhayes, G. R., Leavesley, M. G., & Palin, J. M. (2022). Fit for purpose: investigating adaptations in late Pleistocene lithic technology to an island environment at Buang Merabak, New Ireland, Papua New Guinea. World Archaeology, 54(2), 317-337. DOI: https://doi.org/10.1080/00438243.2023.2172070 DOI: https://doi.org/10.1080/00438243.2023.2172070

Kuhn, S. L. (1992). On planning and curated technologies in the Middle Paleolithic. Journal of Anthropological Research, 48(3), 185-214. DOI: https://doi.org/10.1086/jar.48.3.3630634 DOI: https://doi.org/10.1086/jar.48.3.3630634

Liu, C., Shimelmitz, R., Friesem, D. E., Yeshurun, R., & Nadel, D. (2020). Diachronic trends in occupation intensity of the Epipaleolithic site of Neve David (Mount Carmel, Israel): A lithic perspective. Journal of Anthropological Archaeology, 60, 101223. DOI: https://doi.org/10.1016/j.jaa.2020.101223 DOI: https://doi.org/10.1016/j.jaa.2020.101223

Lombard, M., Lotter, M. G., & Caruana, M. V. (2024). The tip cross-sectional area (TCSA) method strengthened and constrained with ethno-historical material from sub-Saharan Africa. Journal of Archaeological Method and Theory, 31(1), 26-50. DOI: https://doi.org/10.1007/s10816-022-09595-1 DOI: https://doi.org/10.1007/s10816-022-09595-1

Manninen, M. A., & Knutsson, K. (2014). Lithic raw material diversification as an adaptive strategy—Technology, mobility, and site structure in Late Mesolithic northernmost Europe. Journal of Anthropological Archaeology, 33, 84-98. DOI: https://doi.org/10.1016/j.jaa.2013.12.001 DOI: https://doi.org/10.1016/j.jaa.2013.12.001

McGregor, H., Gagan, M., McCulloch, M., Hodge, E., & Mortimer, G. (2008). Mid-Holocene variability in the marine 14C reservoir age for northern coastal Papua New Guinea. Quaternary Geochronology, 3(3), 213-225. DOI: https://doi.org/10.1016/j.quageo.2007.11.002 DOI: https://doi.org/10.1016/j.quageo.2007.11.002

Monnier, C., Girardeau, J., Pubellier, M., Polvé, M., Permana, H., & Bellon, H. (1999). Petrology and geochemistry of the Cyclops ophiolites (Irian Jaya, East Indonesia): consequences for the Cenozoic evolution of the north Australian margin. Mineralogy and Petrology, 65(1), 1-28. DOI: https://doi.org/10.1007/BF01161574 DOI: https://doi.org/10.1007/BF01161574

Nettle, D. (1998). Explaining global patterns of language diversity. Journal of Anthropological Archaeology, 17(4), 354-374. DOI: https://doi.org/10.1006/jaar.1998.0328 DOI: https://doi.org/10.1006/jaar.1998.0328

Nutman, E., Richards, M., Leclerc, M., Mountain, M.-J., & Denham, T. (2025). Geochemical evidence of cultural continuity in lithic procurement from the Late Pleistocene to recent Holocene at Nombe rockshelter, Highland Papua New Guinea. Journal of Pacific Archaeology, 15(1), 10-10. DOI: https://doi.org/10.70460/jpa.v15i1.379 DOI: https://doi.org/10.70460/jpa.v15i1.379

O'Connor, S., Barham, A., Aplin, K., Dobney, K., Fairbairn, A., & Richards, M. (2011). The power of paradigms: Examining the evidential basis for early to mid-Holocene pigs and pottery in Melanesia. Journal of Pacific Archaeology, 2(2), 1-25. DOI: https://doi.org/10.70460/jpa.v2i2.56 DOI: https://doi.org/10.70460/jpa.v2i2.56

O'Connor, S., Barham, A., Aplin, K., & Maloney, T. (2017). Cave stratigraphies and cave breccias: Implications for sediment accumulation and removal models and interpreting the record of human occupation. Journal of Archaeological Science, 77, 143-159. DOI: https://doi.org/10.1016/j.jas.2016.05.002 DOI: https://doi.org/10.1016/j.jas.2016.05.002

O'Connor, S., & Dickinson, W. R. (2010). Stone disc beads from Watinglo shelter, northern Papua New Guinea. Journal of Pacific Archaeology, 1(2), 188-191. DOI: https://doi.org/10.70460/jpa.v1i2.29 DOI: https://doi.org/10.70460/jpa.v1i2.29

Ono, R., Fuentes, R., Pawlik, A., Sofian, H. O., Aziz, N., Alamsyah, N., & Yoneda, M. (2020). Island migration and foraging behaviour by anatomically modern humans during the late pleistocene to Holocene in Wallacea: New evidence from Central Sulawesi, Indonesia. Quaternary International, 554, 90-106. DOI: https://doi.org/10.1016/j.quaint.2020.03.054 DOI: https://doi.org/10.1016/j.quaint.2020.03.054

Ota, Y., & Chappell, J. (1999). Holocene sea-level rise and coral reef growth on a tectonically rising coast, Huon Peninsula, Papua New Guinea. Quaternary International, 55(1), 51-59. DOI: https://doi.org/10.1016/S1040-6182(98)00024-X DOI: https://doi.org/10.1016/S1040-6182(98)00024-X

Pavlides, C. (2004). From Misisil cave to Eliva hamlet: rediscovering the Pleistocene in interior West New Britain. In V. Attenbrow & R. Fullagar (Eds.), A Pacific Odyssey: Archeology and Anthropology in the Western Pacific. Papers in Honour of Jim Specht (pp. 97-108). Blackwell. DOI: https://doi.org/10.3853/j.0812-7387.29.2004.1406

Pétrequin, P., & Pétrequin, A.-M. (1993). Écologie d'un outil: la hache de pierre en Irian Jaya (Indonésie). CNRS Editions.

Premo, L. S. (2015). Mobility and cultural diversity in central-place foragers: Implications for the emergence of modern human behavior. In Mesoudi, A and Aoki, K. (eds.) Learning strategies and cultural evolution during the Palaeolithic (pp. 45-65). Springer. DOI: https://doi.org/10.1007/978-4-431-55363-2_5

Rangan, H., Bell, K. L., Baum, D. A., Fowler, R., McConvell, P., Saunders, T., Spronck, S., Kull, C. A., & Murphy, D. J. (2015). New genetic and linguistic analyses show ancient human influence on baobab evolution and distribution in Australia. PLoS One, 10(4), e0119758. DOI: https://doi.org/10.1371/journal.pone.0119758 DOI: https://doi.org/10.1371/journal.pone.0119758

Reimer, P. J., Austin, W. E., Bard, E., Bayliss, A., Blackwell, P. G., Ramsey, C. B., Butzin, M., Cheng, H., Edwards, R. L., & Friedrich, M. (2020). The IntCal20 Northern Hemisphere radiocarbon age calibration curve (0–55 cal kBP). Radiocarbon, 62, 725-757. DOI: https://doi.org/10.1017/RDC.2020.41 DOI: https://doi.org/10.1017/RDC.2020.41

Shaw, B., Field, J. H., Summerhayes, G. R., Coxe, S., Coster, A. C., Ford, A., Haro, J., Arifeae, H., Hull, E., & Jacobsen, G. (2020). Emergence of a Neolithic in highland New Guinea by 5000 to 4000 years ago. Science Advances, 6(13), eaay4573. DOI: 10.1126/sciadv.aay4573 DOI: https://doi.org/10.1126/sciadv.aay4573

Shaw, B., Hawkins, S., Becerra-Valdivia, L., Turney, C. S., Coxe, S., Kewibu, V., Haro, J., Miamba, K., Leclerc, M., & Spriggs, M. (2022). Frontier Lapita interaction with resident Papuan populations set the stage for initial peopling of the Pacific. Nature Ecology & Evolution, 6(6), 802-812. DOI: https://doi.org/10.1038/s41559-022-01735-w DOI: https://doi.org/10.1038/s41559-022-01735-w

Shipton, C. (2023). Miniaturization and abstraction in the Later Stone Age. Biological Theory, 18: 253-268. DOI: https://doi.org/10.1007/s13752-022-00423-z DOI: https://doi.org/10.1007/s13752-022-00423-z

Shipton, C., Kealy, S., Mahirta, Irfan, A., Patridina, E., & O'Connor, S. (2021). Miniaturized Late Pleistocene lithic technology from Alor Island articulates with the records of Flores and Timor across southern Wallacea. PaleoAnthropology, 2021, 1-20. DOI:10.4207/PA.2021.ART145

Shipton, C., O'Connor, S., & Kealy, S. (2021). The Biogeographic threshold of Wallacea in human evolution. Quaternary International, 574, 1-12. DOI: https://doi.org/10.1016/j.quaint.2020.07.028 DOI: https://doi.org/10.1016/j.quaint.2020.07.028

Shipton, C., O’Connor, S., Jankowski, N., O’Connor-Veth, J., Maloney, T., Kealy, S., & Boulanger, C. (2019). A new 44,000-year sequence from Asitau Kuru (Jerimalai), Timor-Leste, indicates long-term continuity in human behaviour. Archaeological and Anthropological Sciences, 11, 5717-5741. DOI: https://doi.org/10.1007/s12520-019-00840-5 DOI: https://doi.org/10.1007/s12520-019-00840-5

Shipton, C., O’Connor, S., Kealy, S., Mahirta, Syarqiyah, I., Alamsyah, N., & Ririmasse, M. (2020). Early ground axe technology in Wallacea: the first excavations on Obi Island. PLoS One, 15, e0236719. DOI: https://doi.org/10.1371/journal.pone.0236719 DOI: https://doi.org/10.1371/journal.pone.0236719

Shipton, C., O’Connor, S., Reepmeyer, C., Kealy, S., & Jankowski, N. (2020). Shell Adzes, Exotic Obsidian, and Inter-Island Voyaging in the Early and Middle Holocene of Wallacea. The Journal of Island and Coastal Archaeology, 15, 525-546. DOI: https://doi.org/10.1080/15564894.2019.1581306 DOI: https://doi.org/10.1080/15564894.2019.1581306

Sillitoe, P. (2002). Always been farmer-foragers? Hunting and gathering in the Papua New Guinea Highlands. Anthropological Forum, 12(1), 45-76. DOI: https://doi.org/10.1080/00664670220128808 DOI: https://doi.org/10.1080/00664670220128808

Sillitoe, P., & Hardy, K. (2003). Living lithics: ethnoarchaeology in highland Papua New Guinea. Antiquity, 77(297), 555-566. DOI: https://doi.org/10.1017/S0003598X00092619 DOI: https://doi.org/10.1017/S0003598X00092619

Summerhayes, G. (2000). Lapita Interaction. Terra Australis 15. Australian National University.

Summerhayes, G. R. (2009). Obsidian network patterns in Melanesia - sources, characterisation and distribution. Bulletin of the Indo-Pacific Prehistory Association, 29, 109-123. DOI: https://doi.org/10.7152/bippa.v29i0.9484 DOI: https://doi.org/10.7152/bippa.v29i0.9484

Szabó, K., Brumm, A., & Bellwood, P. (2007). Shell artefact production at 32,000–28,000 BP in Island Southeast Asia: thinking across media? Current Anthropology, 48(5), 701-723. DOI: https://doi.org/10.1086/520131 DOI: https://doi.org/10.1086/520131

Torrence, R., & Swadling, P. (2008). Social networks and the spread of Lapita. Antiquity, 82(317), 600-616. DOI: https://doi.org/10.1017/S0003598X00097258 DOI: https://doi.org/10.1017/S0003598X00097258

Whitaker, A. R., Eerkens, J. W., Spurling, A. M., Smith, E. L., & Gras, M. A. (2008). Linguistic boundaries as barriers to exchange. Journal of Archaeological Science, 35(4), 1104-1113. DOI: https://doi.org/10.1016/j.jas.2007.08.004 DOI: https://doi.org/10.1016/j.jas.2007.08.004

White, J. P. (2004). Where the wild things are: prehistoric animal translocation in the circum New Guinea archipelago. In S. M. Fitzpatrick (Ed.), Voyages of Discovery: The archaeology of islands (pp. 147-164). Praeger.

Woodroffe, S. A., & Horton, B. P. (2005). Holocene sea-level changes in the Indo-Pacific. Journal of Asian Earth Sciences, 25(1), 29-43. DOI: https://doi.org/10.1016/j.jseaes.2004.01.009 DOI: https://doi.org/10.1016/j.jseaes.2004.01.009