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題名 | 臺灣海岸帶類型、形貌特徵及其板塊構造之意義=Types、Geomorphic Characteristics and Tectonic Significance of Taiwan Coastal Zone |
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作者姓名(中文) | 蔣正興; 俞何興; | 書刊名 | 臺灣海洋學刊 |
卷期 | 40:2 2002.12[民91.12] |
頁次 | 頁161-178 |
分類號 | 353.4 |
關鍵詞 | 海岸帶; 分類; 板塊構造; 構造形貌; 臺灣; Coastal zone; Classification; Plate tectonics; Tectonomorphic; Taiwan; |
語文 | 中文(Chinese) |
中文摘要 | 臺灣島海岸線長約1250公里,依板魂構造與形貌特徵可將海岸帶分成東部碰撞前緣海岸與西部後緣海岸兩種主要類型,碰撞前緣海岸長約300公里,後綠海岸綿廷近430公里。東部碰撞有緣海岸主要位於活動造山帶上,海岸瀕臨臺灣島東部南北走向山脈,與狹窄的大陸棚相鄰,海岸線呈現南北平直走向。東部海岸持續上升,波浪重覆侵蝕海岸,形成顯著海崖與海岸階地。西部海岸位於穩定前陸盆地上,造山沉積物由東往堆積推進,呈現可向中國大陸之弧狀海岸,與寬廣的大陸棚及海岸平原相鄰。西部海岸接受中央山脈大量沉積物供應堆積,經波浪搬運及堆積形成洲潟海岸。臺灣海岸之形貌與板塊構造呈現一致性,海岸之形成主要受板塊構造影響。 臺灣北部岬灣海岸與南部珊瑚礁海岸主要受到海洋、陸地與生物作用等因素影響。北部岬灣海岸因地質構造線與海岸線垂直,砂頁岩互層的岩層受到差異侵蝕作用,形成顯著岬灣相間地貌;南部珊瑚礁海岸,則主要由生物作用所形成者。 |
英文摘要 | The length of coast around the island of Taiwan is about 1250 km long. On the basis of tectonomorphic characteristics Taiwan coastal zone can be divided into two major types: eastern collision coast about 300 km long and western trailing-edge coast about 430 km in length. The eastern collision coast is located along the active suture zone and stretches in a north-south direction parallel to the Coastal Range. The eastern coastal zone is juxtaposed by very narrow shelf and its coastlines are relatively straight. Prominent sea cliffs and marine terraces occur at eastern coast mainly resulting from marine erosion and tectonic uplift of eastern Taiwan. The trailing-edge coast in western Taiwan is situated on the stable foreland basin. Orogenic sediments are progressively transported westward and deposited to form convex coastline towards Mainland China. The western coast submerges into relatively wide Taiwan Strait shelf seaward and is neighbored by flat coastal plain landward. Much sediment derived from Central Range is transported by longshore currents and deposited to form barrier-lagoon coast in western Taiwan. Large-scale geomorphology of Taiwan coastal zone is closely related to tectonic settings. Plate tectonics plays a major role in forming Taiwan coastal zone. Cape-bay coast in northern Taiwan and coral reef coast in southern Taiwan are mainly resulted from combined marine、terrestrial and biological processes. The general trends of geological structures in northern Taiwan are normal to the shorelines. Alternating layers of sand and shale of these structures are undergone differential erosion, resulting in prominent coastal capes and bays. Coral reef coast in southern Taiwan is clearly formed by biological activities. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。