Diamond Head is a volcanic tuff cone on the Hawaiian island of Oʻahu and known to Hawaiians as Lēʻahi. The Hawaiian name is most likely derived from lae plus ʻahi because the shape of the ridgeline resembles the shape of a tuna's dorsal fin.

Is Diamond Head an extinct volcano?

Diamond Head is part of the Ko'olau Range. Ko'olau was a volcano that began erupting below sea level some 2.6 million years ago. ... Diamond Head is the youngest of these landmarks dating itself at about 200,000 years old. The vents are now extinct and Diamond Head has been dormant for about 150,000 years.

What type of volcano is Diamond Head?

Diamond Head is a special type of cinder cone because it was formed very explosively. He has a very large crater compared to the rim size. This type of volcano is called a tuff cone. Koko crater is another example of this type of volcano.