SIA1274: Gas bubbles in Lava -- Cliff Base Trail

Photographer:Calvin J. Hamilton
Copyright:© 2003 Calvin J. Hamilton
Location:Petroglyph National Monument, Boca Negra Canyon, New Mexico

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Notice the gas bubbles in the lava. Internal stresses caused parallel tubes or craks to form as the denser lava cooled and the tubes filled with more frothy lava.

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