St Michaels Cave is situated in the Sydney suburb of Avalon Beach. This sea-side cave is around 110 metres long, 15 metres high and 10 metres wide. The original colonial owner was a Reverend John Therry, who planned to deliver lectures within the cave and build a church above it. The cave was formed by the erosion of a jurassic dyke through triassic sedimentary rocks. The cave is known to be a breeding site for Common bent-wing bats and Large-eared pied bats.[1][2][3][4][5][6]

St Michaels Cave
Location	Avalon Beach, New South Wales, Australia
Coordinates	33°37′44.83″S 151°20′21.23″E
Depth	15 metres
Length	110 metres
Geology	Dolerite & Narrabeen Group
Hazards	falling rocks
Access	not allowed

Coordinates	33.62912°S 151.33923°E / -33.62912; 151.33923
Managing authorities	Pittwater Council

See also

• Sydney Basin
• Newport Formation (NSW)
• Bald Hill Claystone
• Narrabeen group

References

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