アリソガイ製ヘラ状貝製品の曲線的磨耗の成因検討資料 2

アリソガイ製ヘラ状貝製品の曲線的磨耗の成因検討資料 2 手前は有吉北貝塚出土アリソガイ製ヘラ状貝製品(372図2)、後2つは現生アリソガイ 【資料の意味】2つの平面と現生アリソガイを交差させ、その断面線で現生アリソガイを切断した。そうすると、縄文中期アリソガイ製ヘラ状貝製品にみられる曲線的磨耗の形状が現れることを示す。アリソガイ製ヘラ状貝製品は腹縁部を直角に近い角度である平面に継続して擦ったために磨耗したと想定できる。 3Dモデルを 3DF Zephyr v5.009でアップロード。 Source: Objaverse 1.0 / SketchfabInvestigative Materials on the Causes of Curved Wear on Arisogai-made Spatulate Shell Artifacts 2 In the foreground is an Arisogai-made spatulate shell artifact unearthed from the Arikitakita Shell Mound (Figure 372-2); the two items in the background are modern Arisogai specimens. 【Meaning of the Materials】Two planes were intersected with a modern Arisogai specimen, and the specimen was cut along the resulting cross-sectional lines. This demonstrates that the curved wear morphology observed on Middle Jomon-period Arisogai-made spatulate shell artifacts can be replicated. It can be inferred that these artifacts experienced wear due to continuous rubbing against a planar surface at an angle close to a right angle along their ventral margins. The 3D model was uploaded using 3DF Zephyr v5.009. Source: Objaverse 1.0 / Sketchfab