...As a result, coral reefs are broadly classified into apron reefs, fringing reefs, barrier reefs, atolls, table reefs, and patch reefs (Figure 1). The topographical elements that serve as classification criteria for each type are the presence or absence of a lagoon and its depth, the degree of continuity of the reef flat, the depth of the base of the reef slope on the open ocean side, the relative position of the width of the reef to the width of the continental shelf, and the presence or absence of a central island. The distribution of reefs is characterized by the fact that barrier reefs and atolls tend to be concentrated in low-latitude waters, while fringing reefs, apron reefs, and table reefs tend to be concentrated in mid-latitudes around the former. ... *Some of the terminology that refers to "reef flat" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この結果サンゴ礁は,エプロン礁apron reef,裾礁fringing reef,堡礁barrier reef,環礁atoll,卓礁table reef,離礁patch reefに大別される(図1)。各タイプの分類規準となる地形要素は礁湖の有無や深度,堤状をなす礁外縁が低潮位面にほぼ一致した平たん部すなわち礁原reef flatの連続性の程度,外洋側の礁斜面の基底部の深度および陸棚の幅に対する礁全体の幅の相対的な位置,このほかに中央島の有無などである。礁の分布の特徴は,堡礁と環礁が低緯度の海域に集中し,裾礁とエプロン礁,および卓礁は前者の周辺部の中緯度に集中する傾向を示していることである。… ※「reef flat」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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