The Pinnacles (Western Australia)

The Pinnacles are limestone formations within Nambung National Park, near the town of Cervantes, Western Australia.

Pinnacles with tops similar to mushrooms are created when the calcrete capping is harder than the limestone layer below it.

[2] The raw material for the limestone of the Pinnacles came from seashells in an earlier era that was rich in marine life.

[3][4] A second theory states that they were formed through the preservation of tree casts buried in coastal aeolianites, where roots became groundwater conduits, resulting in the precipitation of indurated (hard) calcrete.

[5] A third proposal suggests that plants played an active role in the creation of the Pinnacles, based on the mechanism that formed smaller "root casts" in other parts of the world.

[7] The best season to visit the Pinnacles is in the months of August to October, as the days are mild and wildflowers, along with wattle, begin to bloom in the spring.