Volcanoes

When a continental plate and an oceanic plate move toward each other and collide, the edge of the oceanic plate goes down into the part of the mantle which consists of molten rocks. At a depth of 125 to 160 km below the earth's surface, the heat is so great that the rock which goes down is partially melted. This partial melting of rocks generates magma. The downgoing rocks also brings water. The other materials in the mantle interact with the water and also generate magma. Magma has lower density than the surrounding rocks. The gas from the melting rock which mixes with the magma makes it rise.

As magma rises, it melts its way through the surrounding rocks and forms a large chamber where magma is stored until it finds it way out to the earth's surface.

No, an explosive typically requires a detonator or some other form of initiation device to trigger the explosion. The detonator provides the necessary shockwave or heat to initiate the chemical reaction within the explosive material and cause it to detonate.

Higher viscous magma flows slower and with more difficulty compared to lower viscous magma. This is because higher viscous magma has a higher resistance to flow due to its thicker consistency, which can result in more explosive and violent eruptions.

Europe's most active volcano, Mount Etna in Italy, has erupted more than 200 times in recorded history. It has been erupting for over 500,000 years, making it one of the most active volcanoes in the world.

South Sister volcano last erupted around 2,000 years ago in the late Pleistocene. Since then, it has remained dormant.

A maroon community might engage in activities such as farming, hunting, herbal medicine, storytelling, drumming and dancing, as well as resisting slavery or oppressive colonial authorities. These activities are often rooted in their African cultural heritage and their need for self-sufficiency and autonomy.

Yes, Corsica does not have any active volcanoes. The island's geological history does not include recent volcanic activity.

Sedimentary rocks are formed through the accumulation and compression of sediment. The movement of tectonic plates causes the deformation, uplift, and erosion of rock formations, which eventually results in the deposition of sediments that form sedimentary rocks. Therefore, the presence and characteristics of sedimentary rocks can provide information about past tectonic activities in an area.

Ocean trenches occur where plates are moving towards each other and one plate is being pushed beneath the other in a process called subduction. Trenches are formed at convergent plate boundaries where oceanic crust is being forced downward into the mantle.

The sentence incorrectly implies that rock itself melts to form magma. In reality, the heat from the mantle causes the surrounding rock to melt and form magma which then rises towards the crust. Consider revising the sentence to accurately reflect this process.

The volcano that covered an entire ancient city is Mount Vesuvius, which erupted in 79 AD and buried the Roman city of Pompeii under volcanic ash and pumice.

Thunderheads, or cumulonimbus clouds, build up from warm, moist air rising into the atmosphere. As this air rises, it cools and condenses, forming a large, towering cloud capable of producing thunderstorms and severe weather.

A subduction zone is formed at the bottom of the ocean where two plates collide. This is where one tectonic plate is forced beneath the other into the Earth's mantle, leading to the formation of deep ocean trenches and volcanic arcs.

As the lava or magma rises up to the surface, it cools. Thus, causing the hot lavaor magma to cool and start to harden. As it starts to harden it leaves a trail from bottom to top of the ocean or sea of which it is in. When it is at the top of the surface it forms a big mound or pile of lava or magma. As this mound cools and the lava or magma keeps building up, the trail settles to the bottom of the sea or ocean. When it finally sinks to the bottom, and you can see it, it has formed an island.

for MEDC + LEDC - tilt meters, seismographs, temperature readers, preparations in schools etc. (drills) , emergency kits packed, monitoring the volcano, sending out warnings and evacuating the people early and quickly

Yes. A good example of a tectonic plate boundary where there is active volcanism and seismicity (earthquakes) is the western coast of the South American continent which forms a boundary where the Nazca plate is being subducted under the South American plate which has created the volcanoes within the Andes mountain range as well as some of the worlds largest earthquakes.

Arturs Seja's first eruption as a professional tennis player was in 2015 when he won his first ATP Challenger Tour title in San Luis Potosi, Mexico. This victory helped him break into the top 200 of the ATP rankings for the first time in his career.

At a volcanic island arc, an oceanic plate slides into the mantle and thus oceanic crust is destroyed. The volcanoes add material on to of the crust, but to not cause the crust to expand outward.

Not necessarily. Volcanoes appear when there are gaps in the earth's surface such as faults. The pressure inside the earth forces the magma (when molten rock is under the surface, it is called magma; lava when above) up to the surface. The molten material hardens and through successive eruptions, will build a cone or dome shape.

Lava tubes are created when a stream of lava runs down a slope slowly. The outer lava hardens while the lava inside continues on. The tubes that you walk through are made after the lava has come through.

When an oceanic plate moves under a continental plate, a subduction zone is formed. The oceanic plate is forced down into the mantle, where it melts and creates magma. This magma can then rise to the surface, causing volcanic activity on the continental plate.

Volcanoes on the edges of the Pacific plate are often referred to as "Ring of Fire" volcanoes. This is due to their location around the Pacific Plate's boundaries, where tectonic activity leads to frequent volcanic eruptions.

1. On May 18, 1980, Mount St. Helens experienced a massive eruption, causing a lateral blast that devastated the surrounding area.
2. The eruption led to the collapse of the summit of the volcano, creating a horseshoe-shaped crater.
3. Over subsequent years, the volcano went through a series of dome-building eruptions that gradually rebuilt the summit.
4. Mount St. Helens remains an active volcano, with its most recent eruptive activity occurring in the early 2000s.

The 1980 eruption of Mount St. Helens produced dacite, which has an intermediate-felsic composition.

No, not all volcanic eruptions emit large amounts of gas. The amount of gas released during an eruption can vary depending on factors such as the type of volcano, the magma composition, and the eruption style. Some volcanic eruptions may release more gas than others, but it is not a universal characteristic shared by all eruptions.

Taal Volcano does not have any "crates." It is a small volcano located in the Philippines with a caldera lake at its center. The volcano is known for its picturesque landscape and historical eruptions.