Largest Underwater Volcanoes

By siliconindia   |   Saturday, 26 November 2011, 01:14 IST
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Morro Rock in California

Morro Rock is one of a line of ancient volcanic intrusions or sometimes called the Seven Sisters or The Nine Morros, depending on how many of the peaks are included in the count. They are a unique set of landmarks between the city of Morro Bay and the City of San Luis Obispo in California.

 Morro Rock and indeed all of the Seven Sisters or The Nine Morros, are all volcanic necks, the rock that solidified in the "piping" of the volcano. It is a 576 feet tall plug of a volcano and is one of the series extending for many miles inland.