Obsidian Sourcing at Uliland Bundok Site and its Implications for Mobility, Exchange, and Social Contexts in the Philippine Metal Age

This article discusses the results of chemical analysis to trace the source of the obsidian artifacts from the site of Ulilang Bundok in Batangas, Philippines. The obsidian artifacts used in this study were excavated from the site of Ulilang Bundok while samples of obsidian were also collected from known obsidian sources in Nagcarlan, Batangas, and Pagudpod, Ilocos Norte, for comparative purposes. Chemical analyses of the obsidian artifacts and source samples were carried out on a scanning electron microscope using the energy dispersive X-ray spectrometer at the University of Science Malaysia, Penang and the electron microprobe at the University of Malaya, Kuala Lumpur. Multi-elemental analysis and statistical procedures performed on elemental data obtained from the obsidian artifacts and sources provided strong indications that the obsidian artifacts from Ulilang Bundok were made using obsidian obtained from the Nagcarlan source. The chemical sourcing results are significant in that they suggest that obsidian was a limited and valued raw material that was likely mined and traded through expanding social exchange networks. This has further implications for understanding how the complexity and spatial extent of trade reflects emerging social complexity in the Philippines Metal Age

Obsidian Sourcing and Characterization in the Celebes Region: An Initial Interpretation on the “Celebes Seafaring People”

The peopling of Island Southeast Asia is told through the Austronesian migration theory. During the Neolithic Period (ca. 6000–5000 BP), the Austronesians entered the Philippines altering the cultural landscape and heralding the beginning of the Neolithic. The Austronesian people continued expanding through Island Southeast Asia, the Pacific, and as far as Madagascar. It is the most influential multiregional archaeological theory in Southeast Asia and the Pacific Region. Although archaeologists, as a whole, generally support this theory, the operations governing the Austronesian migration is still subject to intense debate. Theories suggest that migration is not as straightforward as commonly presented. In spite of their movement towards the Pacific, some Austronesian population stayed in the Celebes area and may have developed a close-knit exchange system with their neighbors powered by sophisticated ancient maritime technology and shared cultural affiliations. This paper calls this maritime network as the “Celebes Seafaring People.” The “Celebes Seafaring People” hypothesis is the first study to focus on a smaller aspect of a much larger theory, allowing a clearer perspective on the early cultures of this Region. Currently, the hypothesis encompasses three island groups: Northern Mindanao, Philippines; Sabah, Malaysia; and Talaud Islands, Indonesia. This is an initial interpretation of the “Celebes Seafaring People” hypothesis through geochemical analysis of obsidian found in the island groups in the Celebes Region. These group of people may have a complex maritime exchange network and share the same cultural affiliation during the Neolithic Period. Further investigation must done to substantiate such theoretical interpretation

[Special section on volcanic glass] PHILIPPINE OBSIDIAN AND ITS ARCHAEOLOGICAL APPLICATIONS

Obsidian sourcing has been used in Philippine archaeology for the first time. This paper discusses the potential of this new approach for studying the mobility patterns and exchange networks of early Filipinos. Currently, two obsidian sources have been identified in the Philippines. The Nagcarlan and Pagudpod sources are both located on the island of Luzon. X-ray fluorescence spectroscopy (XRF) was used to obtain a chemical signature of these sources and to link obsidian artefacts recovered at three archaeological sites to their geological source. The results provide evidence for long distance movement of obsidian in the past. A review of all known obsidian artefacts recovered from archaeological sites in the different islands and provinces of the Philippines provides essential background for further studies of obsidian movement and exchange

Mobility of early Islanders in the Philippines during the Terminal 1 Pleistocene/Early Holocene boundary: PXRF-analysis of obsidian artefacts

The Philippine archipelago spans over two distinct biogeographic zones, Sundaland and Wallacea. We report in this paper on finds from Ilin Island just off the coast of SW Mindoro, and El Nido in Northern Palawan. While the island of Palawan is linked to Sundaland, Mindoro and Ilin Island belong to Wallacea, east of Huxley’s Line. Ongoing archaeological investigations at Bubog 1 Rockshelter on Ilin Island and Ille Cave & Rockshelter in northern Palawan, delivered obsidian artefacts, found in Terminal Pleistocene and Early Holocene layers. PXRF analysis of the obsidian samples from Mindoro and Palawan shows that they were coming from the same, yet unknown source. They clearly indicate that the two distinct palaeogeographical regions were linked to each other, suggesting human interaction and maritime networks as early as ca. 12ka BP. The results of this study contribute substantially to our understanding of the mobility of early islanders during the Terminal Pleistocene and the processes of human island adaptation and enhance our current knowledge of subsistence strategies across the region