The 199m-long cave is formed in Jurassic sandstone (about 160 million years old) of the Murihiku Terrane, though the cave itself is much younger, ten to hundreds of thousands of years old.
A 199-meter-long cave exists within Jurassic sandstone (approximately 160 million years old), located in the Murihiku Terrane. However, the cave's age is significantly younger, ranging from tens of thousands to hundreds of thousands of years.