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Abstract <p>This study employs non-destructive methods to evaluate the extent of the deterioration of stromatolites from the Mesozoic Era in Gyeongsan, Republic of Korea, that are uniquely exposed at a singular scale. The stromatolite measures approximately 10 m in length and up to 4.5 m in thickness, with a domed structure extending from south to north. Deterioration types such as peeled-off weathering, siallitization, biocontamination, and cracks were confirmed along with varying stages of exfoliation via visual observation, a percussion method using a scalpel handle, and infrared thermal imaging analysis. Also, ultrasonic velocity measurements were employed to assess the degree of weathering, revealing a relative weakening of the physical properties of the south and north sides of the stromatolite. These deterioration types are interpreted to have occurred due to the influence of various climatic environments, such as sunlight and precipitation on the surface of the earth. Therefore, the installation of protective structures, including roof, is imperative for the conservation and management of stromatolites. This study is expected to provide basic data for non-destructive deterioration evaluation methods for geoheritage.</p>

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Deterioration Evaluation and Conservation Schemes of Dome-Shaped Stromatolite from the Geoheritage Site in Gyeongsan, Republic of Korea

  • 期刊论文

  • 发表日期：

    2025年10月30日

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  • Gyu Hye Lee,
  • Hyeri Yang,
  • Chan Hee Lee

摘要

Abstract

This study employs non-destructive methods to evaluate the extent of the deterioration of stromatolites from the Mesozoic Era in Gyeongsan, Republic of Korea, that are uniquely exposed at a singular scale. The stromatolite measures approximately 10 m in length and up to 4.5 m in thickness, with a domed structure extending from south to north. Deterioration types such as peeled-off weathering, siallitization, biocontamination, and cracks were confirmed along with varying stages of exfoliation via visual observation, a percussion method using a scalpel handle, and infrared thermal imaging analysis. Also, ultrasonic velocity measurements were employed to assess the degree of weathering, revealing a relative weakening of the physical properties of the south and north sides of the stromatolite. These deterioration types are interpreted to have occurred due to the influence of various climatic environments, such as sunlight and precipitation on the surface of the earth. Therefore, the installation of protective structures, including roof, is imperative for the conservation and management of stromatolites. This study is expected to provide basic data for non-destructive deterioration evaluation methods for geoheritage.