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  1. No Access

    Article

    Estimating millimeter-scale surface roughness of rock outcrops using drone-flyover structure-from-motion (SfM) photogrammetry by applying machine learning model

    A quantitative outcrop survey was conducted in three coastal areas in Japan to estimate the relationship between the surface morphology and visual information of well-exposed rocks using photogrammetry of dron...

    Takumu Nakamura, Arata Kioka, Kosuke Egawa, Takuma Ishii… in Earth Science Informatics (2024)

  2. No Access

    Article

    K-Ar dating of illites for time constraint on tectonic burial metamorphism of the Jurassic Nampo Group (West Korea)

    The timing of tectonic burial metamorphism of the early Mesozoic Nampo Group (western Korea) related to the Jurassic Daebo orogeny was first constrained by K-Ar dating of illite in sedimentary rocks. Two shale...

    Kosuke Egawa, Yong Il Lee in Geosciences Journal (2011)

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    Article

    Structural and provenance analyses of a newly defined major fault: The Homyeong Fault as a northern boundary fault of the Cretaceous Nagdong Trough, South Korea

    The Homyeong Fault on the Yecheon Shear Zone is newly defined and described in the northwestern part of North Gyeongsang Province, South Korea. In the study area, the basement rocks consist, of the Precambrian...

    Kosuke Egawa, Daekyo Cheong, Shigeru Otoh in Geosciences Journal (2006)