• Title/Summary/Keyword: 패총

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Recent shell midden studies in Korea (우리나라 패총 연구의 최근 동향)

  • Deog-im, An
    • Korean Journal of Heritage: History & Science
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    • v.39
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    • pp.39-58
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    • 2006
  • This study reviews recent shell midden studies in Korea. With more interest in biological materials, recent shell midden studies have attempted to reconstruct palaeoenvironment, and understand subsistence economy, the formation processes and function of sites and past culture. Especially, one of the major topics in prehistoric Korean shell midden studies is the transitional process from hunter-gatherer to farmer. To solve these questions related with shell middens, new sampling strategies and excavation techniques have been adopted. Analytical methods combined with scientifical technologies also have been introduced to shell middle studies. These methods indude stable isotope analyses(Oxygen isotope and Carbon and Nitrogen isotope analyses) and growth-line analysis, etc.

Seasonality of shellfish gathering using oxygen isotope analysis of Crassostrea gigas from the Gagok-ri shell midden site, Dangjin (산소동위원소 분석을 이용한 당진 가곡리 패총 굴 (Crassostrea gigas) 의 채집 계절 연구)

  • An, Deogim;Lee, Insung
    • The Korean Journal of Malacology
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    • v.30 no.1
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    • pp.1-8
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    • 2014
  • Oxygen isotope analysis was carried out on a oyster (Crassostrea gigas) from the neolithic age Gagok-ri shell midden site, Dangjin, Korea to determine the seasonality of shellfish gathering and site occupation. Isotope samples were taken from the hinge section of the left valve of the oyster. The isotope values of the shell range from -2.02‰ to -6.05‰ vs PDB. The isotope profile shows a seasonal temperature cycle, providing information related to seasonality of shellfish gathering. The isotope values towards the edge of the hinge are gradually increasing, suggesting progressively cooling and a fall period of shell gathering and site occupation. The result shows that the oxygen isotope analysis using oyster shell hinges can be used for archaeological seasonality studies.

Growth Analysis of the hard clam, Meretrix petechialis (Lamarck) collected from the Daejuk-ri Shell Middens, Seosan, Korea (서산 대죽리 패총에서 출토된 말백합 Meretrix petechialis (Lamarck)의 성장 연구)

  • Ryu, Dong-Ki;An, Deog-Im
    • The Korean Journal of Malacology
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    • v.29 no.2
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    • pp.121-127
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    • 2013
  • In this study, growth-line analysis was carried out on the hard clam (Meretrix petechialis) collected from the Neolithic shell middens in Daejuk-ri, Seosan, Korea, to reconstruct palaeoenvironment. Growth increments of 206 specimens of the clam were examined. The ages of the specimens were determined from the rings on the shells. The relationship between shell length and ring radius in each ring group was expressed as a regression line, indicating a correspondence in each ring formation. Growth pattern of the midden specimens was compared to that of modern ones collected from Gimje, Jeonbuk. Growth curves for shell length fitted to the von Berta anffy's growth curve were expressed respectively as follows: $SL_t=102.9025[1-e^{-0.18657(t+1.0906)}]$ in the shell midden specimens, $SL_t=104.2583[1-e^{-0.2277(t+0.7499)}]$ in the modern ones. The relationship between shell length (SL; mm) and shell height (SH; mm) was expressed by the following equations: SH = 0.7791 SL + 3.6636 ($R^2$ = 0.946) in the midden specimens, SH = 0.8103 SL + 0.5145 ($R^2$ = 0.991) in the modern ones. The results of the tests regarding the differences between regression coefficients and elevations of growth curves of these two populations demonstrate that the slopes were not significantly different (p < 0.05), but the elevations were (p > 0.05). However, overall growth curves of the midden and modern populations were not significantly different, indicating that shell growth environments of the two areas are similar. Therefore, it is likely that sea temperature near the midden area could be similar to that of present Gimje area, and thus temperature during the period of the midden formation could be higher than presently known.

Seasonality of shellfish collection determined by growth-line analysis of the hard clam, Meretrix petechialis (Lamarck) recovered from the Daejuk-ri Shell Middens, Seosan, Korea (서산 대죽리 패총 출토 말백합 Meretrix petechialis (Lamarck) 을 이용한 패류 채집의 계절성 연구)

  • An, Deog-Im;Ryu, Dong-Ki
    • The Korean Journal of Malacology
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    • v.29 no.1
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    • pp.77-82
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    • 2013
  • In this study, growth-line analysis was carried out on the hard clam (Meretrix petechialis) recovered from the Neolithic Age Daejuk-ri Shell Middens, Seosan, Korea, with aim to determine the seasonality of shellfish collection and site occupation. Growth increments of 206 specimens of the clam were examined. The marginal index (MI) of the archaeological specimens was calculated and was compared to the monthly marginal index of modern specimens under the assumption that the growth pattern was the same as it is today. MI of the archaeological specimens ranged from 0.13 to 1.29 and was divided into four categories: < 0.63, spring; 0.63-0.76, summer; 0.76-0.89, fall; $$\geq_-$$ 0.89, winter collection. As a result, of 206 specimens, 170 specimens (82.5%) represented spring, 18 (8.7%) summer, 10 (4.9%) fall and 8 (3.9%) winter collection. The results suggest year-round shellfish collection at the sites, with an emphasis on spring. Considering these results it can be inferred that the sites were occupied throughout the year.