Geo quiz 6
|The _ ocean basin is rimmed by the most subduction zones.||Pacific|
|Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?||All of these ( amount of dissolved gas in the magma, temperature of the magma, composition of the magma)|
Nog 66 rijen
- 0.1 Which ocean basin is rimmed by the most subduction zones in the world?
- 0.2 Which ocean basin has the most volcanic activity?
- 0.3 Which region has the greatest concentration of currently active volcanoes?
- 1 What types of plate boundaries have subduction zones?
- 2 Which part of the world has the most volcanoes?
- 3 Where are most volcanoes located quizlet?
- 4 What volcano will erupt next?
- 4.1 What do we call a molten hot liquid rock while it is still below the Earth’s surface?
- 4.2 How does volcanic activity contribute to plate margins where new crust is being formed?
- 4.3 Subduction, stratovolcano’s and explosive eruptions at convergent plate boundaries
- 5 In which ocean basin are most trenches found?
- 6 Where is Atlantic Ocean basin?
Which ocean basin is rimmed by the most subduction zones in the world?
The vast bulk of the earth’s volcanic activity takes place along the Pacific Ring of Fire, which is also known as the Pacific Rim. A explanation of the plate boundaries would include a discussion of the Pacific Ring of Fire that runs around the western coast of North America.
- The process of subduction in the middle of the American The Central American trench is responsible for the formation of volcanoes.
- A transform boundary is shown by the San Andreas Fault.
- The Juan de Fuca plate slides under the North American plate, which results in the formation of volcanoes in the Cascade range.
- Volcanoes on the Aleutian Islands are caused by the subduction of the Pacific plate beneath the North American plate in the region’s northernmost regions.
An example of a composite volcano that occurs as a result of convergent plate boundaries is the spectacular explosive eruption of Mount Vesuvius in Italy in the year A.D.79: Volcanoes can be found near the borders of convergent plates all the way around the Pacific Ocean basin, although the most common locations are at the edges of the Pacific, Cocos, and Nazca plates.
- Subduction zones are denoted by trenches.
- A series of volcanoes known as the Cascades may be found near a convergent boundary, which is an area where an oceanic plate is subducting beneath a continental plate.
- In particular, the volcanoes are the consequence of the Juan de Fuca, Gorda, and Explorer Plates being subducted beneath North America.
The volcanoes are situated directly above the point at which the subducting plate reaches the appropriate level in the mantle for melting to take place (Figure 1). Even though the present-day summits of the Cascades are not more than 2 million years old, the Cascades have been active for the past 27 million years.
- Because of their location in an area that is prone to storms and the fact that they are located far enough north, several of the volcanoes are covered by glaciers.
- On this interactive map of the Cascades, you can view photographs and read descriptions of each of the volcanoes that make up the range. Figure 3.
Mount Baker in the state of Washington.
Which ocean basin has the most volcanic activity?
Volcano. Around the world, there are around 1,500 volcanoes that have the potential to become active, as stated by the United States Geologic Survey. The majority are clustered in an area known as the Ring of Fire, which is circumscribed by the Pacific Ocean.
Which region has the greatest concentration of currently active volcanoes?
A recent investigation published in the journal Quartz found that Antarctica had the most number of volcanoes per unit area of any other continent.
What type of plate boundary has the least volcanoes?
This part of the article examines the connection between plate tectonics, earthquakes, and volcanoes, which contributes to the explanation of how volcanoes are formed. If you look at a map that depicts the distribution of earthquakes throughout the world, you’ll see that they have a tendency to be clustered in distinct belts.
- Consequently, earthquake sites are the primary source of data used to create maps of the borders between tectonic plates.
- If we look at where volcanoes are located across the world, we can see that the majority of them are located on plate boundaries.
- In example, there is a zone known as the Pacific Ring of Fire that around the edge of the Pacific Plate.
This region is filled with volcanoes. A map of the world highlighting the locations of active volcanoes and the tectonic plates they sit above. This map was provided to us by the United States Geological Survey. Even though the tectonic plates are in constant touch with one another, they continue to shift position in relation to one another. Plates that are migrating apart from one other and a new crust is being generated between the two plates at the same time constitute divergent constructive boundaries. The term “destructive borders” refers to convergent boundaries, which occur when two tectonic plates move closer together and the ancient crust is either pulled down into the mantle at a subduction zone or pushed upwards to create mountain ranges. An illustration illustrates the link between the structure of the Earth and the movement of the tectonic plates, shown as a cross section of the planet. The color of ocean crust is lighter than that of continental crust, which is darker brown. BGS ukri.com; any and all rights reserved.
- Volcanoes are most likely to emerge in one of these three environments: Plate borders that are constructive destructive plate boundaries hot places Volcanoes are not normally seen at the margins of transformation zones.
- One of the factors contributing to this phenomenon is the fact that there is either very little or no magma present near the plate boundary.
A Quick Reminder The iron- and magnesium-rich magmas that give rise to basalts are by far the most typical magmas to be found along the constructive plate edges. Even while silicon-rich magmas can occasionally erupt near subduction zones, the most typical type of magma to erupt there is less iron-rich magma, known as intermediate magma, which produces andesite lavas.
- The ratio of iron to magnesium and silicon to other elements determines the runniness of the magma.
- On one end of the range, basaltic magmas that are rich in iron and magnesium have the lowest viscosity, while magmas that are rich in silicon have the highest viscosity and are the least runny.
- Magmas that are basaltic are typically the hottest, and the lower their viscosity as compared to other types of magma as their temperature increases.
In addition, basaltic magmas frequently have a low crystal content, which contributes to their fluidity. Even though basaltic magmas typically do not include a lot of gas, magmas that contain a lot of gas can nonetheless be described as having a runnier consistency.
In conclusion, basaltic magmas that are rich in iron and magnesium have a low viscosity, allowing them to flow easily, but intermediate and silicon-rich magmas are extremely sticky and have a high viscosity. When runny basaltic magma erupts as lava, it flows out of the earth via lengthy surface fractures or through volcanic vents and may be sprayed into the air as stunning lava fountains.
Lava is formed when liquid basaltic magma cools and solidifies. Lava can travel more slowly as blocky masses that bulldoze their way along the ground or it can flow over the earth like rivers. The eruption of intermediate magma and magma rich in silicon is extremely distinct from one another.
What types of plate boundaries have subduction zones?
Plate Boundaries That Converge, Also Known as Subduction Zones
What are subduction zones?
The subduction zone is the region where two lithospheric plates collide and collide, with one plate riding on top of the other. The majority of volcanoes that are found on land may be found running parallel to and inland from the plate boundary.
Which part of the world has the most volcanoes?
THE COUNTRY OF INDONESIA – Over 197 million people in Indonesia live within 100 kilometers of a volcano, and approximately nine million of those people live within 10 kilometers of a volcano. There are more volcanoes in Indonesia than there are in any other country in the globe.
- Mount Tambora erupted in 1815 and caused the biggest volcanic eruption in modern history.
- This record still stands today.
- The Pacific Ring of Fire encompasses a number of different locations, including Indonesia, and is considered to be the most seismically and volcanically active region on the planet.
Numerous tectonic plates collide and grind against one another in this horseshoe-shaped area that spans 40,000 kilometers and borders the Pacific Ocean. Volcanism is produced as a result of the process of subduction when it occurs at what is known as a convergent plate boundary.
When two tectonic plates clash, one plate with a greater density, which contains oceanic crust, falls beneath another plate with a lower density, which contains either continental crust or younger, hotter, and consequently less dense oceanic crust. This process is known as subduction. Magma is formed when a tectonic plate sinks into the Earth’s mantle and releases fluids that cause the plate above it to melt, resulting in the formation of magma.
After that, it rises and explodes at the surface, forming an arc-shaped chain of volcanoes that are inward of the subducting plate edge but parallel to it. Because Indonesia is located at the point where multiple plates are convergent, the subduction processes and volcanism that occur there are quite complicated.
The majority of Indonesia’s volcanoes, on the other hand, are located inside the Sundra Arc, which is an island volcanic arc that was formed as a result of the subduction of the Indo-Australian Plate beneath the Eurasian Plate. The movement of the Pacific Plate beneath the Eurasian Plate is the primary catalyst for the volcanism that can be seen in eastern Indonesia.
The most hazardous stratovolcanoes are those that originate near the convergent plate boundary because these volcanoes are distinguished by pyroclastic flows that travel at extremely high speeds and are capable of producing highly explosive eruptions.
Mount Agung, which is located in Indonesia, is a stratovolcano that erupted on June 29 for the second time in the last year. The eruption sent ash more than two kilometers into the air and caused hundreds of flights to the famous tourist destination of Bali to be canceled. shayes17 / Getty Images is responsible for the image.
GUATEMALA The eruption of the Guatemalan stratovolcano known as Volcan de Fuego (Volcano of Fire) on June 3 brought devastation not only to the people of Guatemala but to the rest of the world as well. Horrifying images and videos of people attempting to flee the swiftly moving pyroclastic flow filled the news.
- The location of Guatemala inside the Ring of Fire, similar to that of Indonesia, as well as the subduction-related processes that come along with that location are the causes of the volcanoes that can be found in Guatemala.
- The Cocos Plate, which is considerably smaller than the North American-Caribbean Plate, is being pushed under it by the subduction of the Cocos Plate, which is located on the other side of the Pacific Ocean.
On the other hand, in contrast to Indonesia, the convergent border between these two plates may be found on land, rather than in the water. As a result, the Guatemalan arc does not produce islands but rather a series of onshore volcanoes that trends in a northwest-southeast direction.
Along the western coast of South America, farther south, the Andes mountain range, which is the longest continental mountain range in the world, was formed by the same mechanism that caused the Rocky Mountains to develop. Volcanism can be traced back to the movement of the Nazca–Antarctic Plate beneath the South American Plate in this scenario.
Countries like Chile and Peru are affected by this phenomenon. Photo by Shane Myers and provided by Getty Images HAWAII It’s impossible not to visualize a volcano whenever someone discusses the Hawaiian islands. However, the volcanoes that are seen in Hawaii are not typical.
- The reason for this is that you won’t find them on a plate boundary.
- In point of fact, Hawaii is located smack dab in the heart of the Pacific Plate, which is the biggest plate in the globe.
- In the same way as Iceland, Hawaii likewise sits above a volcanic hot point.
- The Pacific Plate is moving to the northwest over a relatively constant mantle anomaly, which results in volcanism that generates a linear chain of islands inside the Pacific Ocean.
However, this is only possible because the Pacific Plate is moving. If a volcano were to form over the hot area, it would be transported away by the sliding tectonic plate over the course of millions of years. The older volcano goes dormant, continues to cool and sink, and eventually forms a mountain submerged beneath the ocean while the newer one begins to form.
- The formation of the Hawaiian islands has been going on for the past seventy million years as a result of this process.
- The typical shield volcanoes that develop in this kind of geological setting are brought about by slow-moving eruptions of basaltic lava, and they very rarely experience explosive eruptions.
Kilauea, the youngest of the Hawaiian shield volcanoes, experienced a violent eruption on May 3 of this year, and since then, lava with temperatures of 1,170 degrees Celsius has been streaming over the island and into the ocean. Kilauea is widely considered to be one of the world’s most active volcanoes, if not the most active volcano overall.
Is the Philippines in the Ring of Fire?
Overview of Disasters – The Philippines, which is situated along the typhoon belt in the Pacific, receives an average of twenty typhoons per year, five of which are considered to be damaging. Because it is located in what is known as the “Pacific Ring of Fire,” it is prone to experiencing regular volcanic eruptions and earthquakes.
Where are most volcanoes located quizlet?
The vast majority of volcanoes are found in conjunction with diverging plate boundaries, such as the mid-ocean ridge, or in subduction zones that are located around the perimeter of oceans.
What volcano will erupt next?
The sources and usage are in the public domain. On Sunday, October 20, 2019, the Civil Air Patrol took this aerial photograph of the top caldera of Mauna Loa, which is known as Moku’weoweo. The name given to the pit crater that can be seen in the lower left corner of the photograph is Lua Poholo.
In the backdrop, you can see out cones that were produced during Mauna Loa’s eruptions in 1940 and 1949, as well as cracks that continue across the middle of the caldera. The most recent eruption of Mauna Loa, which occurred in 1984, resulted in the formation of these cracks. This is what is available: https://geonarrative.
usgs. gov/maunaloa/ Please also view the most current article about Volcano Awareness Month 2022 that was published in “Volcano Watch.” Preparations are being made for the next eruption of the world’s most active volcano, Mauna Loa. Storymaps, also known as geonarratives, are a form of interactive online mapping that combines maps with supplemental text and images.
This geonarrative gives an overview of the eruptive history of Mauna Loa as well as the threats associated with the volcano. It also contains interactive maps and datasets to assist Island of Hawai’i people in preparing for the next eruption. The most recent eruption of Mauna Loa occurred in 1984, and the volcano is expected to erupt again in the future.
This poses a substantial risk to the people who live on the slopes of the volcano. Text for the geonarrative was taken in significant part from a fact sheet published by the United States Geological Survey titled “Mauna Loa: History, Hazards, and Risk of Living With the World’s Largest Volcano” (Trusdell, 2012).
What do we call a molten hot liquid rock while it is still below the Earth’s surface?
Molten rock that is found deep under the Earth is referred to as magma by scientists, whereas molten rock that is seen on the surface of the Earth is referred to as lava.
How does volcanic activity contribute to plate margins where new crust is being formed?
Subduction, stratovolcano’s and explosive eruptions at convergent plate boundaries
Molten rock rises to fill the space left between the plates as the plates move apart. It will eventually turn into a new crust.
Which of these is a fast moving avalanche of hot gas ash and rock?
A pyroclastic flow is a thick flow of hardened lava chunks, volcanic ash, and hot gases that is flowing at a high rate of speed. It poses a grave threat to the lives of everything that dares to cross its path.
In which ocean basin are most trenches found?
The majority of trenches may be found in the Pacific Ocean, but they can be found in other parts of the world as well. Trenches are distinguished by their length, narrowness, and extreme depth. The Mariana Trench, which is located close to the Mariana Islands in the Pacific Ocean, is the world’s deepest ocean chasm.
Which ocean basin has the most trenches Why?
There are ocean trenches in every ocean basin on the globe, with the deepest ocean trenches being located in the Pacific as part of the so-called “Ring of Fire,” which also contains active volcanoes and earthquake zones. Ocean trenches can be found in every ocean basin on the planet.
What are the ocean basins of the world?
Even though there is only one ocean on Earth, it is typically subdivided into four main ocean basins: the Arctic, the Atlantic, the Indian, and the Pacific. Even though there is only one ocean on Earth, it is traditionally subdivided into four major ocean basins.
- For the purposes of Exploring Our Fluid Earth, big landmasses that are separated from one another by natural barriers, primarily water, are referred to as continents, whilst smaller landmasses are referred to as islands.
- Africa, Antarctica, Australia, Eurasia, North America, and South America make up the six continents that make up our planet.
When the earth is broken up into its several broad geographical sections, islands are often categorized with the continent that is located the nearest to them.
Where is Atlantic Ocean basin?
Approximately 41,105,000 square miles are included within the scope of the Atlantic Ocean’s territory. The Atlantic Ocean, which is the world’s second biggest ocean basin, is located to the east of the United States, while the Pacific Ocean, which is the largest ocean basin on the planet, is located to the west of the United States.
The Atlantic Ocean is the second biggest ocean basin in the world, behind the Pacific Ocean, covering roughly 20 percent of the surface of the Earth. The Pacific Ocean is the largest ocean basin in the world. On the other hand, its total area is just marginally greater than one-half that of the Pacific Ocean.
The Atlantic Ocean separates the continents of Europe and Africa from the continents of North and South America on its western side. The Atlantic Ocean is connected to the Arctic Ocean in the polar region and to the Southern Ocean in the equatorial region.
- In the minds of many researchers, there are two distinct basins that make up the Atlantic Ocean: the North Atlantic and the South Atlantic.
- The “global ocean conveyor,” a circulation pattern that helps govern the climate on Earth, begins in the North Atlantic, where waters drop after being cooled by temperatures in the arctic.
The word “Atlantic” refers to the Greek deity Atlas, from whom the ocean gets its name.