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Portsea Hole : ウィキペディア英語版 | Portsea Hole
The Portsea Hole is a depression in the seafloor of Port Phillip near Portsea in Victoria, Australia. The undefined area of the depression, generally assessed at , is one of six separate areas that comprise the Port Phillip Heads Marine National Park and is a popular site for divers.〔 ==Features== The Portsea Hole is a remnant section of the drowned valley of the Yarra River, descending sharply from the depth of the surrounding seabed to , exposing changes in the strata of the limestone sides with depth. It is characterized by diverse and abundant fish assemblages as well as a rich benthic community of marine invertebrates, encrusting algae, sponges and soft corals.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Portsea Hole」の詳細全文を読む
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