Dean's Blue Hole
Not a linear cave; the published dimensions are the surface opening (about 45 x 55 m) and the chamber (at least 100 m across). The tourism ministry and the Grand Bahama Museum give 663 ft (about 202 m); Vertical Blue gives 203 m.
A coastal blue hole near Clarence Town on Long Island, about 200 m deep, that opens below a narrow neck into a cavern at least 100 m across. It is best known as the venue of the Vertical Blue freediving competition.
Dean's Blue Hole sits in a sheltered bay next to a beach on Long Island, ringed on three sides by rock walls. At the surface it measures roughly 45 by 55 m, narrows to a series of ledges at 10 to 15 m, and then opens into a huge chamber that the freediving organiser Vertical Blue describes as at least 100 m in diameter.
With a depth usually given as about 202-203 m, it is among the deepest known blue holes; the Grand Bahama Museum and Vertical Blue call it the second deepest blue hole in the world, while the Bahamas tourism ministry says third deepest. How it formed is still debated, since it is much deeper than most Caribbean blue holes.
The site is used mainly for freediving and snorkelling. It hosts the annual Vertical Blue freediving competition, and the water is sheltered from swell and current. No cave penetration route or land-manager diving rules are published.
地质
Vertical Blue notes that the origin of the hole is unresolved; one hypothesis is that a much deeper cave migrated upward as its ceiling collapsed over time.
环境条件
Vertical Blue describes no current or waves inside the hole and visibility of roughly 10 to 50 m. Tarpon, turtles and reef fish visit the entrance area.
典型范围来自已发表资料，不代表当前实际状况。
入口与潜点
One open entrance from a public beach and lagoon.
仅供方位参考，不可用于导航。空心圆点为大致位置。
本页所有信息及其来源 (7)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| Dean's Blue Hole is about 663 ft (202 m) deep.Vertical Blue gives 203 m. Ranking conflicts: Vertical Blue and the Grand Bahama Museum say second deepest; the tourism ministry says third. | 已报告 | [1] [3] [2] |
| The hole measures about 45 x 55 m at the surface, narrows to about 25 x 35 m with ledges at 10-15 m, then opens into a cavern at least 100 m in diameter.Freediving organiser's description. | 已报告 | [2] |
| Visibility is about 10 to 50 m.Freediving organiser's figure; typical, not current. | 已报告 | [2] |
| The annual Vertical Blue freediving competition is held at the hole. | 已核实 | [1] [2] |
| Visitors reach the hole by a rocky path from the beach; contact is the Long Island Tourist Office.No permit or diving rules listed. | 已核实 | [1] |
| The formation of the hole is not fully understood; one hypothesis is upward migration of a deeper cave by roof collapse. | 已报告 | [2] |
| Area coordinates are those of Clarence Town in the GeoNames gazetteer; the Grand Bahama Museum places the hole in Clarence Town.Settlement-level; the hole lies close to the town. | 已报告 | [4] [3] |
已核实：来自我们直接查阅的官方或主要来源。已报告：仅来自二手来源。来源存在冲突：注释中列出两种版本。可能已过时：我们找到的最新来源已有一定年代。
由我们根据上述来源以自己的文字整理撰写。 提交更正