Morro Rock detail, Morr Bay, California

This volcanic plug is in Morro Bay, California. It is one of thirteen remnant necks of extinct volcanoes in San Luis Obispo County, and part of the Mono Rock-Islay Hill Complex of the Oligocene epoch (from 27 to 23 million years ago).

Morro Rock, named Le'samo by the Salinan tribe and Lisamu by the Chumash tribe, is a sacred site. A nearby prehistoric settlement of the Chumash dates to at least as early as the Millingstone Horizon (6500-2000 B.C.E.). The Chumash believe that Lisamu should never be climbed, while the Salinan people observe biannual solstice ceremonies by climbing Le'samo.

The rock is mostly composed of the igneous volcanic rock dacite, along with compacted and petrified guano. Starting in the late 1800's until 1969, the rock was quarried for material to build various harbors and breakwaters in the region. The rock is now protected as the Morro Rock State Preserve.

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Taken in: United States / California / Morro Bay (show map)

Taken on: August 15, 2017

Tags:

Morro Bay

California

geology

detail

abstract

rock

stone

texture

nature

Pacific

coast

coastal

erosion

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travel « less

Sets appears in: • Abstract • Dear California more » • 2017 « less

Groups appears in: • California • Abstract by selection more » • Beauty of Nature • California Coast (The California Coast) • Beautiful California • Natural PATTERNS, Shapes, and Textures (curated) • Abstract and Open • NATURAL SCIENCES (Biology and Geology) « less

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