File:Balconies Caves Trail - Pinnacles National Park (8728028174).jpg

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Pinnacles National Monument, located near the San Andreas Fault along the boundary of the Pacific Plate and the North American Plate, is an excellent example of tectonic plate movement. The Pinnacles Rocks are believed to be part of the Neenach Volcano that occurred 23 million years ago near present-day Lancaster, California, some 195 miles (314 km) southeast. The giant San Andreas Fault split the volcano and the Pacific Plate crept north, carrying the Pinnacles. The work of water and wind on these erodible volcanic rocks has formed the unusual rock structures seen today.

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.
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Source Balconies Caves Trail - Pinnacles National Park
Author Joyce Cory on Flickr as docentjoyce
Camera location36° 31′ 12.44″ N, 121° 10′ 07.21″ W Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
Attribution: Joyce Cory
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This image was originally posted to Flickr by Joyce Cory on Flickr as docentjoyce at https://flickr.com/photos/99003655@N00/8728028174. It was reviewed on 10 May 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

10 May 2021

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Date/TimeThumbnailDimensionsUserComment
current13:35, 10 May 2021Thumbnail for version as of 13:35, 10 May 20212,501 × 1,817 (2.09 MB)Sentinel user (talk | contribs)Transferred from Flickr via #flickr2commons

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