The Oscillator Cave
| Field | Detail |
|---|---|
| Surveys | No Survey |
| Dimensions | Length: approx. 20 m |
| Rock | Table Mountain Sandstone |
In the next inlet to the south of Black Balls Cave is a sea cave called the Oscillator. The water at the entrance to the cave is quite deep, and entry is doubtful even at low tide. Above the entrance is a narrow slot that leads down at an angle of about 30 degrees. This terminates in a drop into the main passage. As the water rushes in and out of the main entrance, the air rushes in and out of the upper passage — hence the cave name. The walls of the narrow passage are coated with a hard, thin, mustard coloured crust. The cave is at least 20 m long.