天坑
Fossil Cave (Green Waterhole)
Cave: CDAA site rating [1] [2] [3] (Cave-rated divers must stay above 13 m and not pass the signed restriction into the phreatic passage.). Advanced Cave: CDAA site rating [1] [2] [3] (Beyond the signed restriction / deeper than 13 m in the phreatic passage.). 以下分类采用该认证体系自身的命名方式，用于描述该潜点所需的培训级别。
A state-managed sinkhole pool near Tantanoola that is the second natural entrance to the Tank Cave system. CDAA Cave-rated divers may enter to 13 m in the phreatic passage; deeper is for Advanced Cave divers.
Fossil Cave, long known as the Green Waterhole, is a small pond that opens into a broad chamber floored with dark silt, with a second small pool and chamber at the far end. It sits on state land managed by the Department for Environment and Water and is booked through the South Australian parks booking system.
The CDAA states that a 2018 exploration connected Tank Cave to Green Waterhole, so this entrance is part of the wider Green Waterhole - Tank Cave system, including the fossil deposits at its western end.
环境
Fresh groundwater in a sinkhole pond and chamber with fine dark silt; the phreatic passage continues deeper beyond a signed point.
通往该地点的其他入口 Green Waterhole - Tank Cave system
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 (9)
| 信息条目 | 状态 | 来源 |
|---|---|---|
| The CDAA directory rates Fossil Cave (5L81) Cave and Advanced Cave, with DEW as manager. | 已核实 | [3] |
| Fossil Cave requires a CDAA Cave qualification, and divers must not go beyond 13 metres into the phreatic passage unless qualified to Advanced Cave level. | 已核实 | [1] [2] |
| Each diver completes a diving indemnity before booking; bookings need at least two divers, at most two dives per day are permitted, and divers may not dive until they receive a confirmation email. | 已核实 | [1] |
| The CDAA directory says bookings must be made at least 48 hours before the timeslot and allows a maximum of five divers per timeslot including instructors. | 已核实 | [2] |
| Fossil Cave timeslots are 8am-10am, 12 noon-2pm and 4pm-6pm.CDAA directory page, undated; confirm in the DEW booking system. | 已核实 | [2] |
| Tank Cave was connected to Green Waterhole in 2018. | 已核实 | [4] |
| Fossil Cave was formerly known as The Green Waterhole; the name was changed in 1989.Wikipedia, citing the SA Government Gazette of 4 May 1989; the gazette itself was not opened. | 已报告 | [5] |
| Coordinates are the Tantanoola locality centre, not the entrance.Area-level point. | 已核实 | [6] |
| Coordinates are the Tantanoola locality centre, not the entrance.Area-level point. | 已核实 | [6] |
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