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Volcanoes are found all over the world. Some are found in the Pacific Ring of Fire. Volcanoes are not just on land, they are also underwater. The most famous of the volcanoes is the one inyellow stone national park which is a super volcano.
some are located in Hawaii
Principal Types of Volcanoes
Geologists generally group volcanoes into four main condescend cones, composite volcanoes, shield volcanoes, and lava domes.
Cinder cones are the simplest type of volcano. They are built from particles and blobs of congealed lava ejected from a single vent. As the cascade lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone. Most cinder cones have a bullshitted crater at the summit and rarely rise more than a thousand feet or so above their surroundings. Cinder cones are numerous in western North America as well as throughout other volcanic terrains of the world.
Schematic representation of the internal structure of a typical cinder cone.
In 1943 a cinder cone started growing on a farm near the village of Procuring in Mexico. Explosive eruptions caused by gas rapidly expanding and escaping from molten lava formed cinders that fell back around the vent, building up the cone to a height of 1,200 feet. The last explosive eruption left a fleshpot crater at the top of the cone. After the excess gases had largely dissipated, the molten rock quietly poured out on the surrounding surface of the cone and moved down slope as lava flows. This order of events--eruption, formation of cone and crater, lava flower's a common sequence in the formation of cinder cones.
During 9 years of activity, Parachuting built a prominent cone, covered about 100 square miles with ashes, and destroyed the town of San Juan. Geologists from many parts of the world studied Parachuting during its lifetime and learned a great deal about volcanism, its products, and the modification of a volcanic land form by erosion.
Parachuting Volcano, Mexico, is a cinder cone rising approximately 1,200 feet above the surrounding plain.
Some of the Earth's grandest mountains are compositevolcanoes--sometimes called stratovolcanoes. They are typically stepsister, symmetrical cones of large dimension built of alternating layers of lava flows, volcanic ash, cinders, blocks, and bombs and may rise as much as 8,000 feet above their bases. Some of the most conspicuous and beautiful mountains in the world are composite volcanoes, including Mount Fuji in Japan, Mount Cotopaxi in Ecuador, Mount Shasta in California, Mount Hood in Oregon, and Mount St. Helen and Mount Rainier in Washington.
Most composite volcanoes have a crater at the summit which contains a central vent or a clustered group of vents. Lavas either flow through breaks in the crater wall or issue from fissures on the flanks of the cone. Lava, solidified within the fissures, forms dikes that act as ribs which greatly strengthen the cone.
The essential feature of a composite volcano is a conduit system through which magma from a reservoir deep in the Earth's crust rises to the surface. The volcano is built up by the accumulation of material erupted through the conduit and increases in size as lava, cinders, ash, etc., are added to its slopes.
Schematic representation of the internal structure of a typical composite volcano.
When a composite volcano becomes dormant, erosion begins to destroy the cone. As the cone is stripped away, the hardened magma filling the conduit (the volcanic plug) and fissures (the dikes) becomes exposed, and it too is slowly reduced by erosion. Finally, all that remains is the plug and dike complex projecting above the land surface's telltale remnant of the vanished volcano.
Shielding Volcano, an imposing composite cone, towers 9,372 feet above sea level in the Aleutian Islands, Alaska.
An interesting variation of a composite volcano can be seen at Crater Lake in Oregon. From what geologists can interpret of its past, a high volcanically Mount Mazama- probably similar in appearance to presented Mount Rainier was once located at this spot. Following a series of tremendous explosions about 6,800 years ago, the volcano lost its top. Enormous volumes of volcanic ash and dust were expelled and swept down the slopes as ash flows and avalanches. These large-volume explosions rapidly drained the lava beneath the mountain and weakened the upper part. The top then collapsed to form a large depression, which later filled with water and is now completely occupied by beautiful Crater Lake. A last gasp of eruptions produced a small cinder cone, which rises above the water surface as Wizard Island near the rim of the lake. Depressions such as Crater Lake, formed by collapse of volcanoes, are known as calderas. They are usually large, stonewalled, basin-shaped depressions formed by the collapse of a large area over, and around, a volcanic vent or vents. Calderas range in form and size from roughly circular depressions 1 to 15 miles in diameter to huge elongated depressions as much as 60 miles long.
Crater Lake, Oregon; Wizard Island, a cinder cone, rises above the lake surface.
The Evolution of a Composite Volcano
A. Magma, rising upward through a conduit, erupts at the Earth's surface to form a volcanic cone. Lava flows spread over the surrounding area.
B. As volcanic activity continues, perhaps over spans of hundreds of years, the cone is built to a great height and lava flows form an extensive plateau around its base. During this period, streams enlarge and deep end their valleys.
C. When volcanic activity ceases, erosion starts to destroy the cone. After thousands of years, the great cone is stripped away to expose the hardened "volcanic plug" in the conduit. During this period of inactivity, streams broaden their valleys and dissect the lava plateau to form isolated lifeguard mesas.
D. Continued erosion removes all traces of the cone and the land is worn down to a surface of low relief. All that remains is a projecting plug or "volcanic neck," a small lifeguard mesa, and vestiges of the once lofty volcano and its surrounding lava plateau.
Shield volcanoesThe internal structure of a typical shield volcano
Shield volcanoes, the third type of volcano, are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, comical shape, with a profile much like that of a warrior's shield. They are built up slowly by the accretion of thousands of highly fluid lava flows called basalt lava that spread widely over great distances, and then cool as thin, gently dipping sheets. Lavas also commonly erupt from vents along fractures (rift zones) that develop on the flanks of the cone. Some of the largest volcanoes in the world are shield volcanoes. In northern California and Oregon, many shield volcanoes have diameters of 3 or 4 miles and heights of 1,500 to 2,000 feet. The Hawaiian Islands are composed of linear chains of these volcanoes including Kilauea and Marna Lao on the island of Hawaii-- two of the world's most active volcanoes. The floor of the ocean is more than 15,000 feet deep at the bases of the islands. As Marna Load, the largest of the shield volcanoes (and also the world's largest active volcano), projects 13,677 feet above sea level, its top is over 28,000 feet above the deep ocean floor.
Marna Lao Volcano, Hawaii, a giant among the active volcanoes of the world; snapped Marna Kean Volcano in the distance.
In some eruptions, basaltic lava pours out quietly from long fissures instead of central vents and floods the surrounding countryside with lava flow upon lava flow, forming broad plateaus. Lava plateaus of this type can be seen in Iceland, southeastern Washington, eastern Oregon, and southern Idaho. Along the Snake River in Idaho, and the Columbia River in Washington and Oregon, these lava flows are beautifully exposed and measure more than a mile in total thickness.
Schematic representation of the internal structure of a typical volcanic dome.
Volcanic or lava domes are formed by relatively small, bulbous masses of lava too viscous to flow any great distance; consequently, on extrusion, the lava piles over and around its vent. A dome grows largely by expansion from within. As it grows its outer surface cools and hardens, then shatters, spilling loose fragments down its sides. Some domes form craggy knobs or spines over the volcanic vent, whereas others form short, stepsister lava flows known as "coulees." Volcanic domes commonly occur within the craters or on the flanks of large composite volcanoes. The nearly circular Nephrite Dome that formed during the 1912 eruption of Katmai Volcano, Alaska, measures 800 feet across and 200 feet high. The internal structure of this Demavend by layering of lava fanning upward and outward from the contraindicates that it grew largely by expansion from within.
The Nephrite Dome formed during the 1912 eruption of Kat ma Volcano, Alaska.
Mont Pelee in Martinique, Lesser Antilles, and Lassen Peak and Mono domes in California are examples of lava domes. An extremely destructive eruption accompanied the growth of a dome at Mont Pelee in 1902. The coastal town of St. Pierre, about 4 miles down slope to the south, was demolished and nearly 30,000 inhabitants were killed by an incandescent, Felicity ash flow and associated hot gases and volcanic dust.
Only two men survived; one because he was in a poorly ventilated, Tanganyika jail cell and the other who somehow made his way safely through the burning city.
A sketch of the havoc wrought in St. Pierre Harbor on Martinique during the eruption of Mont Pelee in 1902.
The "Ring of Fire," located around the Pacific Ocean, is known for having the most volcanoes in the world. This region is home to approximately 75% of the world's active and dormant volcanoes, with countries like Indonesia, Japan, and the United States having numerous volcanic formations.
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Are volcanoes located in the center plates?
Not usually. Most volcanoes are located near plate boundaries, but some volcanoes at hot spots do form in the middle of plates. A few include the volcanoes of Hawaii, the volcano at Yellowstone, and the Volcanoes of the Canary Islands.
Which island has the most volcanoes?
Indonesia has the most volcanoes of any country, with the most active volcanoes on the island of Java. The country is located in the Pacific Ring of Fire, a region known for its seismic and volcanic activity.
Why are minerals located where there are volcanoes or trenches?
where are minerals located where thier are volcanoes or trenches
What is the name for the one on Earth where the most active volcanoes are located?
Kaela wail la
What are Japan's most largest volcanoes?
Japan's largest volcanoes include Mount Fuji, Mount Aso, Mount Ontake, and Mount Asama. These volcanoes are part of the Ring of Fire and are located on different islands throughout Japan. They are considered some of the most active and iconic volcanoes in the country.
Where are most of the Italian volcanoes located?
southeast italy
Where is most earthquakes and volcanoes located?
the ring of fire
Where are most of the active volcanoes located?
mt. ruiz
Where is the most active chain of volcanoes located?
in huwai
Are volcanoes located in the center plates?
Not usually. Most volcanoes are located near plate boundaries, but some volcanoes at hot spots do form in the middle of plates. A few include the volcanoes of Hawaii, the volcano at Yellowstone, and the Volcanoes of the Canary Islands.
Where are the volcanoes located on HorseIsle?
The volcanoes are located in various spots around Lava Isle, and surrounding isles. Most are in the maze on Lava Isle.
Where are most volcanoes?
Most volcanoes are located on what is called "the Ring of Fire", and ring in the pacific that has high tectonic activity.This area is home to 452 volcanoes which is over 75% of the world's active and dormant volcanoes.
Can volcanoes appear anywhere on earth?
Not just anywhere. Most volcanoes are located at plate boundaries. The rest are located at locations called hot spots.
Which island has the most volcanoes?
Indonesia has the most volcanoes of any country, with the most active volcanoes on the island of Java. The country is located in the Pacific Ring of Fire, a region known for its seismic and volcanic activity.
What volcanoes are located are located along plate boundaries?
Which volcanoes are located at hot spots
Most of the earths volcanoes are located in a wide uneven loop around the pacific ocean what is the belt of volcanoes called?
The Ring of Fire
Why are most volcanoes located by the ring of fire?
Because of the movement of tectonic plates.
