🗊Volcanoes

Volcanoes

Structure of volcanoes Volcanoes are mountains, which have a regular shape. A volcano consists of a magma’s source, where the lava originates, a conduit, via which the lava arises, a crater, where the lava goes from on the ground.

Formation of volcanoes

The Earth's crust has cracks. The magma’s pressure is less near cracks. Magma fuses to forming a magma’s source. Gases, dissolved in magma displace the lava from a magma’s source to a crater. Magma, effused on the ground, is the lava. The temperature of the new lava reaches 1000 C. The Earth's crust has cracks. The magma’s pressure is less near cracks. Magma fuses to forming a magma’s source. Gases, dissolved in magma displace the lava from a magma’s source to a crater. Magma, effused on the ground, is the lava. The temperature of the new lava reaches 1000 C.

Active and extinct volcanoes

Extinct volcanoes are volcanoes never erupted in the human’s history. They are located on each continent (Kilimanjaro). Extinct volcanoes are volcanoes never erupted in the human’s history. They are located on each continent (Kilimanjaro).

Mauna Loa is the largest volcano on the Earth. It is an active shield volcano, with a volume estimated at approximately 18,000 cubic miles (75,000 km3), although its peak is about 120 feet (37 m) lower than that of its neighbor, Mauna Kea, another of five volcanos that from the Islands Of Hawaii. The Hawaiian name "Mauna Loa" means "Long Mountain". Lava eruptions from it are silica-poor, thus very fluid: and as a result eruptions tend to be non-explosive and the volcano has extremely shallow slopes. The volcano has probably been erupting for at least 700,000 years and may have emerged above sea level about 400,000 years ago, although the oldest-known dated rocks do not extend beyond 200,000 years. Its magma comes from the Hawaii hotspot, which has been responsible for the creation of the Hawaiian island chain for tens of millions of years. The slow drift of the Pacific Plate will eventually carry the volcano away from the hotspot, and the volcano will thus become extinct within 500,000 to one million years from now. Mauna Loa is the largest volcano on the Earth. It is an active shield volcano, with a volume estimated at approximately 18,000 cubic miles (75,000 km3), although its peak is about 120 feet (37 m) lower than that of its neighbor, Mauna Kea, another of five volcanos that from the Islands Of Hawaii. The Hawaiian name "Mauna Loa" means "Long Mountain". Lava eruptions from it are silica-poor, thus very fluid: and as a result eruptions tend to be non-explosive and the volcano has extremely shallow slopes. The volcano has probably been erupting for at least 700,000 years and may have emerged above sea level about 400,000 years ago, although the oldest-known dated rocks do not extend beyond 200,000 years. Its magma comes from the Hawaii hotspot, which has been responsible for the creation of the Hawaiian island chain for tens of millions of years. The slow drift of the Pacific Plate will eventually carry the volcano away from the hotspot, and the volcano will thus become extinct within 500,000 to one million years from now.

Kīlauea is located on Hawai’i Island, Hawai’i, in the United States. It lies against the southeast flank of much larger Mauna Loa volcano. Mauna Loa's massive size and elevation (13,677 feet or 4,169 m) is a stark contrast to Kīlauea, which rises only 4,091 feet (1,247 m) above sea level, and thus from the summit caldera appears as a broad shelf of uplands well beneath the long profile of occasionally snow-capped Mauna Loa, 15 miles distant. Kīlauea is a very low, flat shield volcano — vastly different in profile from the high, sharply sloping peaks of stratovolcanoes like Mt. Fuji, Mount Hood, and Mount St. Helens. Kīlauea is located on Hawai’i Island, Hawai’i, in the United States. It lies against the southeast flank of much larger Mauna Loa volcano. Mauna Loa's massive size and elevation (13,677 feet or 4,169 m) is a stark contrast to Kīlauea, which rises only 4,091 feet (1,247 m) above sea level, and thus from the summit caldera appears as a broad shelf of uplands well beneath the long profile of occasionally snow-capped Mauna Loa, 15 miles distant. Kīlauea is a very low, flat shield volcano — vastly different in profile from the high, sharply sloping peaks of stratovolcanoes like Mt. Fuji, Mount Hood, and Mount St. Helens.