NPS / Emily Novack Fault action and earthquakes also account for the talus caves that are another Pinnacles attraction. Deep, narrow gorges or shear fractures were transformed into caves when huge boulders toppled from above, and wedged in the fractures before reaching the ground. These boulders became the ceilings of the talus caves that now entice not only people, but also several kinds of bats.
![]() Geologic FormationsLearn more about the different formations and rock types at Pinnacles. ![]() How Pinnacles FormedDive in to the origin story of the formations that the park is named after. ![]() Cave & Karst SystemsPinnacles is known for its rare talus caves. Discover the geology that underlies these unique cave and karst systems at Pinnacles. ![]() FaultsPinnacles is a hotbed of volcanic and seismic activity. Discover the faults that have shaped the park for millions of years. |
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Last updated: April 27, 2020