괌(GUAM)섬의 海岸環境 = Coastal Environment of the Pacific Guam

다국어 초록 (Multilingual Abstract)

Guam is the most southern at 13˚ N latitude, most populous, and largest island of the Mariana chain in Micronesia. The island is 48 km long and ranges from 6 to 14 km in width. It has a total land area of about 543km2. The land mass was formed by the successive upheavals of limestone beds of fringing coral reef. The northern end of the island is a plateau of rolling hills set on vertical cliffs (Ritidian Point etc.) rising 90 to 100 m above sea level. The cliffs and marine terraces are marked with crevices, and small caves are found at various heights in there. There were formed by the breaking of the waves against what was once the sea level line. The island narrows in the middle around a low dome-shaped mass of land. The tropical climate yields a lush vegetation, including savanna grass, mangroves and various species of palm trees
This paper deals with the coastal environment of the Pacific island Guam. The coastline of the island (mainly from west of Guam) is surveyed in two parts, firstly a field study of Tanguisson beach areas including marine terraces, secondly study of coral reefs around there. Tanguisson areas composed of beach shingles from coral debris, and shows a good outcrops in Guam bedrock of corals and volcanic rocks. It is composed of coral limestone terraces built on top of a submerged volcano. The island is still in young stage of geologic formation, so that less weathering has occurred to create fertile landscape. The most famous Cocos island is what Bird (1963) call 'low island' with a very typical barrier reefs.

목차 (Table of Contents)

• Ⅰ.序論
• Ⅱ.地形 및 地質槪觀
• Ⅲ.海岸環境의 觀察
• Ⅳ.論議
• Ⅴ.要約 및 結論