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The volcanic rocks of the Honolulu Volcanics are diverse; they include alkali basalts, melilite and nepheline basalts, basanites, [3] melilite, [63] nephelinite [85] and websterite, [63] and form an alkaline [81]-nephelinite suite. [2] The variations in composition reflect distinct proportions of melts produced from parent rocks. [86]
View from the top of Diamond Head, 2015. Diamond Head is a volcanic tuff cone on the Hawaiian island of Oʻahu.It is known to Hawaiians as Lēʻahi (pronounced [leːˈʔɐhi]), which is most likely derived from lae (browridge, promontory) plus ʻahi (tuna) because the shape of the ridgeline resembles the shape of a tuna's dorsal fin. [3]
After hundreds of thousands of years of dormancy, Koʻolau volcano began to erupt again. Some thirty eruptions over the past 500,000 years or so have created many of the landmarks around eastern Oʻahu, such as Diamond Head, Koko Head (Hanauma Bay), Koko Crater, Punchbowl Crater, Tantalus, and Āliapaʻakai, and are collectively known as the Honolulu Volcanic Series, or simply Honolulu ...
The Pūhāhonu volcano responsible for the pinnacles is 511 nautical miles (946 km; 588 mi) northwest of Honolulu and 108 miles (94 nmi; 174 km) from French Frigate Shoals. The total area of the two small islets, remnants of an ancient shield volcano, the world's largest, is 5.939 acres (24,030 m 2). [1] The highest peak is 170 feet (52 meters).
(Ma = million years) Map of the Hawaiian Islands and some of the Emperor seamounts showing progression in selected erupted lava ages along the chain (Ma = million years) The Hawaiian–Emperor seamount chain is a series of volcanoes and seamounts extending about 6,200 km (3,900 mi) across the Pacific Ocean .
The volcano started to erupt around 11:30 p.m. local time Sunday in Moku‘āweoweo Caldera, located in Hawaii Volcanoes National Park. Early Monday morning the lava started its migration from the ...
The crater was formed some 75,000 to 100,000 years ago during the secondary activity of the Honolulu Volcanic Series.A crater resulted from the ejection of hot lava through cracks in the old coral reefs which, at the time, extended to the foot of the Koʻolau Mountain Range.
The volcano, Hawaii's second largest next to neighbor Mauna Loa, started erupting through four scratch-like fissures about 12:30 a.m. in an area 2.5 miles southwest of its caldera, the U.S ...
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