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The Shiprock formation is dated at 27 million years old. It stands on Navaho land in New Mexico, USA.

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What kind of volcano is shiprock?

Shiprock is a volcanic plug, which is a type of stratovolcano formed from the hardened magma that once filled a volcanic vent. Located in northwestern New Mexico, it is a prominent geological feature that rises dramatically from the surrounding landscape. The formation is part of the larger San Juan volcanic field and is composed mainly of volcanic breccia, with the surrounding area shaped by erosion over millions of years. Shiprock is recognized as a sacred site by several Native American tribes.


How did the ridges around Shiprock form?

The ridges around Shiprock, a volcanic rock formation in New Mexico, were formed by the erosion of softer volcanic material surrounding a central volcanic neck. Over time, wind and water eroded the softer rock layers, leaving the harder, more resistant rock of the neck and surrounding ridges exposed. This process created the distinctive spire and ridges that characterize the landscape today. The formation is a remnant of a once-active volcano that erupted approximately 30 million years ago.


What forms in a volcanoes pipe and is later exposed?

In a volcano's pipe, magma can solidify and form a structure known as a volcanic neck or plug. Over time, erosion and weathering can wear away the surrounding rock, exposing this hardened magma. The volcanic neck is often more resistant to erosion than the surrounding material, leading to its prominent elevation once the softer rock has been removed. Examples include prominent formations like Shiprock in New Mexico.


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