ブルーホール
Sawmill Sink
A fossil-rich inland blue hole on Abaco with a toxic hydrogen sulfide layer and oxygen-free deep water. It is a research site: underwater activity is reported to need a special permit.
Sawmill Sink is a near-circular shaft about 15.5 m across in the pine forest of south-central Great Abaco. Below a fresh-water cap lies a cloudy, hydrogen sulfide-rich mixing layer that blocks daylight, and beneath that is salt water with no oxygen, which is why bones and plants on its rubble cone have survived for thousands of years.
The site is known through scientific diving rather than tourism. Fossil recovery there produced extinct tortoises, dozens of Cuban crocodiles, birds, bats and human remains, studied by a team of Bahamian and US researchers. Because of these finds, published accounts report that any underwater activity requires a special permit, and the sink is inside the South Abaco Blue Holes Conservation Area.
環境
Fresh water to about 9.5 m, a hydrogen sulfide-bearing halocline to about 27 m, and anoxic salt water below; a talus cone from about 9 m to 34 m; cave passage continuing south to 54 m.
コンディション
The hydrogen sulfide layer blocks light and is poisonous; National Geographic reported a bacterial layer colouring the water at roughly 9 to 11 m.
公表資料からの一般的な範囲であり、現在のコンディションではありません。
このページのすべての情報とその出典 (7)
| 情報 | ステータス | 出典 |
|---|---|---|
| The opening is nearly circular and up to 15.5 m in diameter. | 確認済み | [1] |
| Fresh water extends to 9.5 m, a hydrogen sulfide-bearing halocline and mixed zone to 27 m, and anoxic salt water below; a talus cone lies from 9 to 34 m. | 確認済み | [1] |
| The cave associated with the sink extends more than 600 m south to depths of 54 m.As published in 2007. | 確認済み | [1] |
| Bacteria colour the water at about 30 to 36 ft (9 to 11 m), and poisonous hydrogen sulfide is present in that layer and the one below.2010 magazine account. | 報告済み | [3] |
| Any underwater activity at Sawmill Sink requires a special permit because of archaeological discoveries.2019 report; authority not named. | 報告済み | [2] |
| A special permit is required for any underwater activity.2019 report. | 報告済み | [2] |
| The sink is in the pinelands of south-central Great Abaco Island.Numeric coordinates withheld: permit-only research site. | 確認済み | [1] |
確認済み：直接開いた公式または一次情報源による記載。報告ベース：二次情報源のみによるもの。情報が競合：注釈に両方のバージョンを記載。最新情報でない可能性あり：確認できた最新の情報源が古い。
上記のソースをもとに、独自の言葉でまとめています。 修正を報告する