An evaluation of faunalturbation by moles : Case study at the Okadaira shell midden, Ibaraki prefecture, Japan

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  • モグラによる遺物の埋没と埋没後擾乱
  • モグラによる遺物の埋没と埋没後擾乱 : 茨城県稲敷郡美浦村陸平貝塚を対象として
  • モグラ ニ ヨル イブツ ノ マイボツ ト マイボツ ゴ ジョウラン : イバラキケン イナシキグン ミホムラ リク タイラガイズカ オ タイショウ ト シテ
  • ─茨城県稲敷郡美浦村陸平貝塚を対象として─

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Abstract

Here I examine the impact of mole (Mogera imaizumii) burrowing activity on a Jomon site. I discuss how mole activities displaced the artifacts in Holocene archaeological sites. First, mole mound soil was investigated in order to elucidate the size of materials which moles are able to move. Second, the size of artifacts, which were excavated from the Okadaira shell midden location D-3 (ca. 3,500 yrs BP), was compared with the size movable by moles. The result showed that artifacts smaller than 5 cm were moved upward and artifacts larger than 5 cm moved downward by moles’ faunalturbation. My results also suggest that evaluation of bioturbation is important to spatial analysis for artifacts of Holocene archaeological sites in the Japanese archipelago.

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