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More model informationAn event of rockfall occurred on the north side of the Unoo-Misaki Tunnel along the Matsukawaura Bridge line. A utility pole collapsed after being caught in falling rocks consisting of brown Dainenji Formation mudstone. The texture or the previous researches (Saito et al., 2021 or Osumi et al., 2021) indicated that the mudstones had been subjected to weathering, resulting in the seperation.
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