Khok Phanom Di (โคกพนมดี) is a deeply stratified prehistoric mound located in the Chonburi Province, Central Thailand, situated on the eastern margin of the Bangkok Plain in the lower reaches of the Bang Pakong River. Excavations conducted in 1984–1985 by archeologist Charles F. W. Higham revealed a layer of cultural material seven meters thick, representing a long history of occupation. Radiocarbon dating indicates the site was occupied for approximately five centuries, spanning the period between roughly 2000 and 1500 BCE. When first settled, Khok Phanom Di was located on a large estuary, a remarkably rich naturally-replenished food resource, supported by a mangrove-dominated shore. The site's rapid growth in height, reaching up to 12 meters above the surrounding rice fields, was due to the regular deposition of mollusk remains forming shell middens, and waste from pottery manufacture. Ornaments of shell and of shark vertebrae from the site are dated to about 4,000 years before the present. Khok Phanom Di has been noted as having special importance for archaeological research in Southeast Asia due to its long and very well-preserved history of occupation.
The excavated cemetery is divided into seven mortuary phases, through which the burial ritual, the grave goods and the position of the shoreline all change. The richest of the burials, known as the Princess of Khok Phanom Di, belongs to the fifth phase. Ornaments of shell and of shark vertebrae from the site are dated to about 4,000 years before the present.
Archeological significance Chris Baker and Pasuk Phongpaichit treat the site as a corrective to the picture of hunter-gatherers as small and mobile. On their summary it was occupied for 500 years from about 2000 BCE by a community of several hundred, visiting at first to take fish and shellfish with game and forest produce, then settling to make bone fish-hooks, shell jewellery and a large and varied body of pottery, and eating some rice that may have come by exchange. After perhaps ten generations, as the sea receded, they cut granite into hoes and shells into harvesting knives; later still they made larger pots by a different technique and with new decoration, which the authors read as a sign of new people arriving. One woman, probably a master potter, was buried with 120,000 shell disc beads together with her tools and examples of her work. The site was abandoned around 1600 BCE.
The site provides valuable insight into human adaptation to the changing tropical coastal habitat and subsequent social dynamics over roughly 20 generations. Excavations uncovered a cemetery containing 154 burials, where individuals were interred alongside ancestors, often arranged in sequential clusters. The inhabitants were specialized coastal hunter-gatherers, exploiting the abundant marine resources and cultivating rice, alongside taking advantage of their environment to create shell jewelry and high-quality potting clay. The long occupation sequence saw major environmental changes, including a dramatic shift in coastline and the possible relocation of the Bang Pakong River channel, which reduced easy access to marine resources. These environmental shifts coincided with notable changes in mortuary ritual, physical activity (such as reduced upper body strength in men), and wealth distribution. Khok Phanom Di was additionally a prominent pottery-making center, and in later mortuary phases, some women and infants were interred with extraordinary wealth, including vast amounts of exotic shell jewelry and tools of the pottery trade, suggesting that women attained high social status through the manufacture and exchange of ceramics.
Sing C. Chew, summarising Charles Higham's published accounts, places the site about twenty-two kilometres from the present coast. Higham and Amphan Kijngam read the people of the first three phases as descended from those of Nong Nor. The stone adzes come from several different sources, which puts the settlement in a regional exchange network. Rice cultivation was established here after the eighteenth century BC, on Higham's account through contact with farmers settling further inland. After about 1700 BC, as the sea rose, the community returned to the sea and to hunting for its food. Of the burials Higham examined, about 41 per cent were of people who died at or soon after birth and more than half of people who did not reach adulthood, with only 7 per cent living beyond forty. Women averaged about 1.54 metres in height and men about 1.62. Nancy Tayles found joint degeneration, anaemia and tooth decay in the remains, the men more often with degeneration of the shoulder and the women with caries.
Shifting culture Observation of material culture at the site through excavations has given researchers valuable insight into how culture and life shifted for the inhabitants of Khok Phanom Di as conditions changed. During the earliest phases of occupation at the site, there is a lack of distinct mortuary ritual, and the inhabitants lived very similarly to hunter-gatherer groups nearby. Above the remains of this first period, archeologists found distinct burial clusters and evidence of more advanced incised pottery production, indicating a transition away from purely hunter-gatherer life. The ecologically abundant estuary environment eventually begins to wane, correlating with decreased marine material found in the site's middens, and evidence of domestic rice agriculture. Once marine conditions returned to the area, rice agriculture appears to have been abandoned in favor of estuarine and marine sustenance, though the presence of significant wealth disparities in grave goods among the interred indicates major shifts to socio-cultural life at the site after the change. Overall, these changes in material remains over the long inhabitation period of the site illustrate the adaptability of the people who inhabited it, and that changes were not linear and instead rooted in environmental and cultural factors.
Mortuary phases The cultural material found at Khok Phanom Di has been divided into seven distinct groups based on age and similarities in the burials within them. This has allowed scholars to present a clear progression of life at Khok Phanom Di as culture and their environment shifted thanks to preservation of context at the site. +Important findings in each mortuary phasePhaseDevelopments 1Supine burials; basic pottery and stone tools2Clustered burials; incised pottery; some grave goods3Evidence of estuarine decline; evidence of rice agriculture4Continued estuarine decline; greater reliance on rice5Estuarine return; ceased rice cultivation; extreme wealth burials6Extreme wealth divide between burials 7Sparse burials; end of occupation
Mortuary Phase 1 The first mortuary phase (MP) has been defined by the first individuals and cultural remains that were interred at the site, thus dating to roughly around 2000 BCE. The lowest layer has been noted to have similarities with the nearby archeological site Nong Nor, and may represent a resettling of this older site's inhabitants. Found in this phase is ash and charcoal, which are suspected to be related to pottery firing, based on a nearby pit with 21 burnishing stones and a clay anvil. A second pit in this phase contained two pottery vessels and seven polished stone adze heads. Other artifacts within this layer include an awl, whetstones, and fishing hooks.
Six individuals were found belonging to the first MP: two men, a woman, and three infants. One of the infants, aged approximately two and a half years old, was buried in a flexed position, while the others were laying flat with their heads to the east. Twelve shell beads were found alongside one of the men, and traces of red ochre were detected on the remains of one of the infants, indicating minimal attention to grave goods during this time.
Mortuary Phase 2 The second MP shares much of its material culture with the first, still containing similar clay anvils, awls, fishhooks, and pottery, but is distinguished by very different burial practices. The individuals buried that have been associated with MP2 are now placed in six tight clusters in a checkerboard pattern, and each cluster contains men, women, and children. The vast majority of the burials continued to be laid flat with their heads pointing east, and though grave goods are still more sparse than during later MPs, 25 intricate decorated pots were unearthed alongside the buried. One of the men was interred with a large number of shell beads, one of the women had multiple burnishing stones, and mineralized wood under some of the burials indicates funeral practices of some sort. MP2 is also noted as having a very high number of infant burials.
The practices in this phase of the site are distinct and set it apart from the first phase, with shifts in burial methodology and the adoption of more numerous and more ornate grave goods. The tightly grouped burials are not seen reproduced by other coastal Southeast Asian settlements, and the styles of the decorated pots do not match with those of inland Neolithic settlements.
Mortuary Phase 3 The third MP, dated to the 18th to 19th century BCE marks a significant advancement in the culture of the people of Khok Phanom Di. Much like the second MP, the grave are grouped into tight clusters, often directly over the top of those from the previous mortuary phase. The combination of women, men, and children, all pointing east, within the clusters continued as well. The burials during this phase were within a thick shell midden that had straight edges and right angles, suggesting that the shell were originally contained within a manmade structure that decomposed over time. Charles Higham speculates this may have been evidence of wooden mortuary chambers. Grave goods during this MP continued to consist of shell beads and pottery.
Evidence for early domestication practices Major changes began to occur during this phase in line with the general progression in Southeast Asia from hunter-gatherer cultures into Neolithic groups. This is the time period when it appears that the local inhabitatns began interacting regularly with domesticated plants and animals. In two burials from the third MP, fecal matter was able to be recovered and analyzed, and partially digested grains of rice of a domestic variety were identified. In addition to that, there were also the remains of beetles that have been identified as pests common in long-term rice storage. In addition to the biological remains of rice, large shells that appeared to be knives or trowels were also unearthed in this phase. Testing with modern replicas of the shell knives revealed that the wear patterns on them are consistent with what would be observed if they were used to harvest rice. Regarding the marine food remains, there appears to be an increase in freshwater shellfish around this time, and Charles Higham believes that this could indicate a potential recession in sea level, possibly creating a more favorable environment for rice agriculture. In addition to the potential of rice domestication, a bone from a domestic Thai dog was also found. Strontium isotope analysis on the teeth of the burials indicate some of the women interred during the later stages of MP3 likely were born and raised outside of Khok Phanom Di before migrating there later in life. Researchers have cited this evidence as indication that the inhabitants of the site must have had contact with outside parties that were well-versed in rice cultivation due to the speed at which the technology was developed, and that the likely recession in sea level was a catalyzing opportunity in the adoption of this lifestyle.
Mortuary Phase 4