學術資源整合系統-相關推薦
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| 作者 | Gong, Shou-Yeh;Liu, Sze-Chieh;Siringan, Fernando P.;Gallentes, Adonis |
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| 出版日期 | 2022 |
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| 著作名稱 | Multiple severe storms revealed by coral boulders at Pasuquin, northwestern Luzon, Philippines.
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| 刊名 | Palaeogeography, Palaeoclimatology, Palaeoecology |
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| 卷 | 606 |
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| 期 | 111195 |
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| 被收錄索引 | SCI |
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| 主題 | 地質 |
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| 關鍵字 | Holocene reef; Tropical cyclone; Tsunami; 230Th dating; South China Sea |
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| 摘要 | Over 30 meter-sized coral boulders are scattered 45–140 m away from the edge and above high tide on a Holocene reef flat at Pasuquin, northwestern Luzon, Philippines. The boulders are overturned or tilted as indicated by the framework fossil corals in them, but have the same lithology as those along the reef edge and thus were likely broken off from there. The dimensions of boulders larger than 3 m were calculated from 3D models constructed by photogrammetry. Their volumes range from 10 to 53 m3. Assuming 2.1 g/cm3 for wet density, weights of boulders would range from 21 to 110 metric tons. Boulders of such size and weight can't be moved by normal waves, and thus must have been dislodged by extreme wave events (EWEs). Small and well-preserved corals found on the surface of seven boulders were collected for 230Th dating to reconstruct the timing of displacement. The ages of corals are 1781.6 ± 1.9, 1903.4 ± 2.7, 1945.8 ± 1.2, 1956.9 ± 1.2, 1956.75 ± 0.99, 1978.1 ± 1.5 and 2002.78 ± 0.88 CE, respectively. These ages are considered to constrain the timing of boulder displacement from the reef edge. We propose that typhoon-induced EWEs were responsible for the displacement of these boulders at Pasuquin. |
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| 資料連結 |  |
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| DOI | doi.org/10.1016/j.palaeo.2022.111195 |
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| 系統號 | NO000006537 |
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