3D analysis of small stone implements in the Jomon period | Tomoyasu | CAAA2021

3D analysis of small stone implements in the Jomon period.
Oka Tomoyasu

Stone implements are the important element on a study of the Jomon period, and these are thought to be used at rituals. They are one kind of lithic tools, which were basically made by flaking, knocking, and polishing.

The purpose of this presentation is to elucidate the rituals which were performed using stone implements in the end of Jomon period. Stone implements made in the middle Jomon period were big, but these became smaller in the late Jomon period. This is an interesting phenomenon, but in this presentation, I consider the rituals after this phenomenon. How can the rituals with small stone implements be characterized? I will consider this by analyzing 3D models.

I examine the techniques to produce the small stone implements in order to clarify the ritual’s character. It is necessary to examine the production traces in order to examine the production techniques, and the 3D model is effective for showing the production traces. I use SfM/MVS to make 3D models. Completed 3D models are analyzed by GIS which are originally used to analyze geographical features. I use GIS to study small stone implements by regarding the surface unevenness on them as geographical features.

Presented on September 17 2021 as part of CAA Australasia Digital Archaeology Conference.

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