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The Liu-chiu Y? is a raised coral reef island, located southwest offshore 14 km from Tung-kang, Pintung Hsien. Two structural depression lines striking NE-SW and E-W separate the island into four blocks. The Liu-Chiu Y? Limestone overlays the Liu-Chiu Y? Mudstone with a uncon-formity relationship. Three steps of marine terraces can be recognized: Pleistonce I, Pleistonce II and Holocene terrace. Based on coral reef dating, elevation of samples and sea level curve, the average uplift rate of west coast is estimated about 2 mm/yr during the period from 34 ka to 10 ka YBP whereas 0.4 mm/yr in east coast since Holocene. The uplift and deformation of marine terraces are influenced both by the tectonic stress coming southweast and downwarping near Kao-Ping Drowned Valley.

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臺灣北端海岸的海階地形

(國立台灣師範大學地理學系, 1988-12-??) 石再添; 許民陽

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臺灣花東海岸海階的地形學研究

(地理學系, 1988-03-??) 石再添; 鄭國雄; 許民陽; 楊貴三

This paper is the first year report of the research project “A Geomorphological Study of Marine Terrace in Taiwan”. The Huatung coast is along the Pacific coast of Eastern Taiwan, adjacent to the convergent boundary of Eurasia Plate and Philippine Sea Plate, marine terrace is typically developed in this region. Based on air photo interpretation, geomorphometry, field excursion and accurate survey of altitude, the results are summarized as follows: 1. Classified and correlated by the continuity of altitude and extend of the marine terrace surfaces, there are three dominate marine terraces in study area. The flights of marine terraces in the southern part are comparatively more widely distributed than in the north, the lowest one and the newly raised wave-cut platform are well developed throughout the study area. 2. Altitude of terraces in the southern part is obviously more higher, expecially in the upper two steps, showing that there are wave-like uplifted and tilted slightly to the north. Yet the lowest steps together its newly raised wave-cut platform have almost the same height throughout the study area, this implies that recent uplift rates are progressing with equal amount, and in the upper steps, the tectonic movement has the property of accumulation. 3. The displacement of terrace surfaces is observed as a short-wave length warping, upwarping has been taken place with the axes in the vicinity of Chanping, Chengkung and Tulan, the distance between the axes is about 25 to 30 km. 4. The third steps are furnished with multi-levelled terraces, at intervals of 2-5 m in elevation, deduces from the mode of seismic uplifts in the neighborhood, those multi-levelled terraces may originated by the co-seismic uplift. 5. The features of marine terraces are also influenced by geological setting, in the area of more?resistant rocks, marine terraces are very narrow and covered with thin marine boulders, coastal landforms such as wave-cut ben

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臺灣西部與南部活斷層的地形學研究

(地理學系, 1984-02-??) 石再添; 鄧國雄; 張瑞津; 石慶得; 楊貴三; 許民陽

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花東海岸海崖後退機制--成崖物質與風暴激浪特性的初步探討

(國立臺灣大學理學院地理學系, 1995-11-01) 許民陽; 沈淑敏

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蘇花海岸南澳、和平、立霧三溪沖積扇三角洲之比較研究

(國立台灣師範大學地理學系, 1985-10-??) 許民陽