Japan Geoscience Union Meeting 2021

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[E] Oral

M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS09] Weathering and conservation of cultural heritage and geosites

Sat. Jun 5, 2021 1:45 PM - 3:15 PM Ch.15 (Zoom Room 15)

convener:Luigi Germinario(University of Padova, Italy), Chiaki T. Oguchi(Institute for Environmental Science and Technology, Graduate School of Science and Engineering, Saitama University), Akos Torok(Budapest University of Technology and Economics), Tetsuya Waragai(Graduate School of Science and Engineering, Nihon University), Chairperson:Luigi Germinario(University of Padova, Italy), Chiaki T. Oguchi(Institute for Environmental Science and Technology, Graduate School of Science and Engineering, Saitama University)

1:45 PM - 2:00 PM

[MIS09-01] Evaluation of the degradation state of dinosaur footprint based on 3D measurement.

*Nobuaki Kuchitsu1, Shuji SAKAI2, Masato FUJITA3 (1.Tokyo National Research Institute for Cultural Properties, 2.Toppan Printing Co., Ltd., 3.Toyama Science Museum)

Keywords: three-dimensional measurement, replica, weathering rate, past shape, Oyama area of Toyama City

Past degradation of footprint fossils of dinosaurs at Oyama Area in Toyama City is discussed through constructing and comparing the past 3D shapes of the fossil. The 3D shapes of the fossil as of the plural in the past were estimated based on the replicas made by taking a mold in the past as well as old photographs taken from various directions as of the plural in the past. The change in the degradation rate in the past was argued by comparing the established 3D shapes in the past. As a result, degradation was detected just after the discovery of a sauropd footprint located in the original outcrop caused by a road construction, but the rate is getting smaller as time passes. On the other hand, the degradation of the ornithopoda footprint, newly found on the one-step lower out crop due to the additional excavation, seems to be getting larger. It will contribute to the discussion of how to conserve such fossils to understand the tendency of the degradation fluctuation in the past.