The Archaeobotany of Khao Sam Kaeo and Phu Khao Thong: the Agriculture of Late Prehistoric Southern Thailand (Volume 1)
Total Page:16
File Type:pdf, Size:1020Kb
The Archaeobotany of Khao Sam Kaeo and Phu Khao Thong: The Agriculture of Late Prehistoric Southern Thailand (Volume 1) Cristina Castillo Institute of Archaeology University College London Thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy of University College London 2013 Declaration I hereby declare that this dissertation consists of original work undertaken by the undersigned. Where other sources of information have been used, they have been acknowledged. Cristina Castillo October 2013 Institute of Archaeology, UCL 2 Abstract The Thai-Malay Peninsula lies at the heart of Southeast Asia. Geographically, the narrowest point is forty kilometres and forms a barrier against straightforward navigation from the Indian Ocean to the South China Sea and vice versa. This would have either led vessels to cabotage the southernmost part of the peninsula or portage across the peninsula to avoid circumnavigating. The peninsula made easy crossing points strategic locations commercially and politically. Early movements of people along exchange routes would have required areas for rest, ports, repair of boats and replenishment of goods. These feeder stations may have grown to become entrepôts and urban centres. This study investigates the archaeobotany of two sites in the Thai-Malay Peninsula, Khao Sam Kaeo and Phu Khao Thong. Khao Sam Kaeo is located on the east whereas Phu Khao Thong lies on the west of the peninsula and both date to the Late Prehistoric period (ca. 400-100 BC). Khao Sam Kaeo has been identified as the earliest urban site from the Late Prehistoric period in Southeast Asia engaged in trans-Asiatic exchange networks. There is evidence of craft specialisation and material culture that links the site to India, China and the rest of Southeast Asia. Phu Khao Thong has similar material culture as Khao Sam Kaeo. The purpose of examining the archaeobotanical results from Khao Sam Kaeo is to add to the understanding of how an early urban site with an active exchange network and specialised craft production would have supported itself. The results provide insights into exchanged foodstuffs and the agricultural base that sustained the different communities at Khao Sam Kaeo: the local population, temporary settlers and transient voyagers. The archaeobotany of Khao Sam Kaeo is compared to the contemporaneous site Phu Khao Thong. Phu Khao Thong lies closer to the Indian Ocean and has more Indian domesticates in the assemblage. 3 TABLE OF CONTENTS Declaration 2 Abstract 3 Table of Contents 4 List of Figures 8 List of Tables 14 List of Appendices 18 Acknowledgements 20 CHAPTER 1 – Introduction 1.1 INTRODUCTION 23 1.2 RESEARCH QUESTIONS 28 1.3 A NOTE ON 'INDIANISATION' 30 1.4 THEORETICAL FRAMEWORK 31 CHAPTER 2 – Geography: Present and Past 2.1 PHYSICAL GEOGRAPHY 34 2.2 GEOLOGY 40 2.3 CLIMATE and RAINFALL 43 2.4 VEGETATION 45 2.5 SOILS 53 2.6 AGRICULTURE 56 2.7 PAST ENVIRONMENT 62 CHAPTER 3 – Archaeobotany in Southeast Asia 3.1 INTRODUCTION 66 3.2 A SHORT HISTORY OF ARCHEOBOTANY IN SOUTHEAST ASIA 66 3.3 SOME CONSIDERATIONS ON SOUTHEAST ASIAN ARCHEOBOTANY 70 CHAPTER 4 – Materials and Methods 4.1 SOURCE DATA 77 4 4.2 MACROREMAINS 77 4.3 PHYTOLITHS 84 4.4 IDENTIFICATION CHALLENGE 85 4.5 REFERENCE COLLECTIONS 86 4.6 CHARRING EXPERIMENTS 87 4.7 OTHER REFERENCES 87 4.8 A FINAL NOTE ON TROPICAL ENVIRONMENTS and SAMPLING 87 CHAPTER 5 – Preservation Bias 5.1 INTRODUCTION 90 5.2 OTHER EXPERIMENTS and RESULTS 92 5.3 METHODOLOGY 98 5.4 OBSERVATIONS 102 5.5 OVERALL RESULTS 105 5.5.1 Absolute frequencies 105 5.5.2 Relative frequencies 108 5.5.3 Shrinkage factors 109 5.5.4 Temperature 112 5.6 ARCHAEOLOGICAL DATA and PRESERVATION BIAS 113 CHAPTER 6 –Khao Sam Kaeo 6.1 SITE DESCRIPTION 114 6.1.1 The material artefacts 116 6.1.2 Early globalisation 122 6.2 CHRONOLOGY 123 6.3 CONTEXTS 125 6.4 DATASETS 131 6.5 RESULTS and DISCUSSION: An ecological and agricultural interpretation 134 6.5.1 The Resource Base 134 6.5.2 Modern contaminants and context security 135 6.5.3 The Economic Crops: cereals and pulses 138 6.5.3.1 Oryza sativa (L.) 140 6.5.3.2 Setaria italica (L.) Beauv. ssp. italica 150 6.5.3.3 Paspalum cf. scrobiculatum 157 6.5.3.4 Vigna radiata (L.) Wilczek var. radiata 158 5 6.5.3.5 Macrotyloma uniflorum (Lamarck) Verdcourt 166 6.5.3.6 Vigna cf. umbellata 169 6.5.3.7 Cajanus sp. / cf. Cajanus 173 6.5.3.8 cf. Lablab 176 6.5.3.9 A few notes on pulses (Fabaceae) 178 6.5.4 The Cash Crops: evidence of exchange networks 179 6.5.4.1 cf. Citrus / Citrus sp. 180 6.5.4.2 cf. Gossypium 182 6.5.4.3 Piper cf. longum 185 6.5.5 Overall analysis of economic crops, pulses and cash crops 189 6.5.6 Weeds 195 6.5.7 Agricultural Practices in Khao Sam Kaeo 202 6.6 KHAO SAM KAEO and THE EVOLUTION OF AGRICULTURE IN MAINLAND SOUTHEAST ASIA 205 6.7 CONCLUSION 208 CHAPTER 7 –Phu Khao Thong 7.1 SITE DESCRIPTION 210 7.2 CHRONOLOGY 213 7.3 CONTEXTS 214 7.4 DATASETS 217 7.5 RESULTS 219 7.5.1 The Resource Base 219 7.5.2 Modern contaminants and context security 220 7.5.3 The Economic Crops: cereals and pulses 221 7.5.3.1 Oryza sativa (L.) 222 7.5.3.2 Eleusine cf. coracana 229 7.5.3.3 Vigna radiata (L.) Wilczek var. radiata 234 7.5.3.4 Macrotyloma uniflorum (Lamarck) Verdcourt 239 7.5.3.5 Vigna cf. mungo 241 7.5.3.6 Lathyrus sativus (L.) 246 7.5.3.7 Vigna cf. umbellata 249 7.5.4 The Cash Crops 251 7.5.4.1 cf. Citrus / Citrus sp. 251 7.5.4.2 Piper cf. longum 252 7.5.4.3 Sesamum indicum 253 7.5.5 Acmella paniculata: weed of agriculture or vegetable? 257 6 7.5.6 Weeds of cultivation 263 7.6 DISCUSSION: East of India and West of Khao Sam Kaeo 266 CHAPTER 8 – Charring Experiments: Interpretation 8.1 INTRODUCTION 272 8.2 CEREAL HUSK 272 8.3 RICE SPIKELET BASES 275 8.4 MUNGBEAN BIAS 283 8.5 THE SMALL MILLET GRAINS 284 8.6 CONCLUSION 285 CHAPTER 9 – Rice in Prehistoric Thailand 9.1 INTRODUCTION 287 9.2 BACKGROUND ON DOMESTICATION OF RICE 288 9.3 DIFFERENTIATING WILD FROM DOMESTICATED RICE 293 9.4 RICE IN THAILAND 298 9.5 ORIGINS and SPREAD OF RICE 308 9.6 GENETIC and MORPHOMETRIC STUDIES 312 9.7 NEW VIEWS ON THE SPREAD OF RICE 323 9.8 CONCLUSION 328 CHAPTER 10 – Discussion and Conclusion 10.1 SUMMARISING THE LATE PREHISTORIC SUBSISTENCE REGIME IN PENINSULAR THAILAND 330 10.2 INDIANISATION and WORLD SYSTEMS 332 10.3 FUTURE WORK 335 BIBLIOGRAPHY 337 APPENDICES 375 7 LIST OF FIGURES CHAPTER 1 Figure 1.1: Map of the Thai-Malay Peninsula showing the location of 24 the two areas of study, Khao Sam Kaeo and Phu Khao Thong and the approximate distance of the Kra Isthmus, and the length of the Peninsula. CHAPTER 2 Figure 2.1: Map of Thailand showing the six regions and the sites 36 Khao Sam Kaeo and Phu Khao Thong. Figure 2.2: Aerial view of Khao Sam Kaeo showing the meandering 38 Ta Taphao river to the west and the site demarcations. Figure 2.3: Elevation map of Thailand with corresponding regions. 39 Figure 2.4: Suggested river and terrestrial routes across the narrowest 40 part of the Thai-Malay peninsula (the Kra Isthmus) which shows Khao Sam Kaeo. Figure 2.5: Map 'A' shows the geology of Thailand. Map 'B' shows the 41 Tertiary basins in dark grey. Figure 2.6: Köppen-Geiger climate type map of Southeast Asia. 43 Figure 2.7: Vegetation map of Thailand. 50 Figure 2.8: Soil map of the Southern Peninsula showing the two sites 55 Khao Sam Kaeo and Phu Khao Thong. Figure 2.9: Land use in the Southern Peninsula of Thailand. 58 Figure 2.10: Map showing localities where interviews were conducted 60 in 2009 in relation to the area of study Khao Sam Kaeo. Figure 2.11: Pollen histogram of AU1. 64 Figure 2.12: Pollen histogram of AU2. 65 CHAPTER 3 Figure 3.1: Cumulative number of Southeast Asian sites excavated and 68 the cumulative number of sites where flotation was used as a recovery technique for plant remains. Figure 3.2: Archaeobotanical methodologies employed in SEA. 69 CHAPTER 4 Figure 4.1: Map showing the locations of soil samples collected for 80 macroremains analysis. Figure 4.2: Images of the team at Khao Sam Kaeo doing flotation and 81 the sieves drying. Figure 4.3: Map showing the locations of soil samples collected for 84 phytolith analysis. CHAPTER 5 Figure 5.1: 1) Oryza sativa (rice) naked, 2) Oryza sativa (rice) husked, 99 3) Vigna radiata (mung bean), 4) Coix lachryma-jobi (job's tears), 5) Glycine max (soy bean), 6) Panicum miliaceum (broomcorn millet) husked, 7) Panicum miliaceum (broomcorn millet) naked, 8) Setaria italica (foxtail millet) husked, 9) Setaria italica (foxtail millet) naked. 8 Figure 5.2: Graph showing the temperatures recorded with the 101 thermocouple. Figure 5.3: SEM images of rice spikelet bases found in the 0.5-1 mm 103 fraction. Figure 5.4: SEM images of a typical charred rice spikelet base from 103 Primtech08 experiment 1A (L) and from Khao Sam Kaeo tp128 us 11 (R).