Lava surrounded a hill, which was eroded, leaving only a crescent-shaped lava hill.
Vesicular basalt: the strings of holes were created by sheets or tubes of gas bubbles that formed as the molten lava cooled.
American Indians and Spanish settlers carved more than 24000 petroglyphs on the volcanic boulders between 1000 BC - 1700 AD. The meaning of most petroglyphs is…
American Indians and Spanish settlers carved more than 24000 petroglyphs on the volcanic boulders in the 14th-17th centuries. The meaning of most petroglyphs is…
The blocks were originally light colored, which became dark colored with time ("varnish"). When the stone is abrased the light color appears again.
