What is divergent in geography?

A divergent boundary occurs when two tectonic plates move away from each other. Along these boundaries, earthquakes are common and magma (molten rock) rises from the Earth’s mantle to the surface, solidifying to create new oceanic crust. The Mid-Atlantic Ridge is an example of divergent plate boundaries.

What is divergent in tectonic plate?

Divergent (Spreading):This is where two plates move away from each other. Molten rock from the mantle erupts along the opening, forming new crust. The earthquakes that occur along these zones, called spreading centers, are relatively small.

What is convergent and divergent in geography?

Divergent boundaries — where new crust is generated as the plates pull away from each other. Convergent boundaries — where crust is destroyed as one plate dives under another. Transform boundaries — where crust is neither produced nor destroyed as the plates slide horizontally past each other.

What are 2 examples of divergent boundaries?

Examples

• Mid-Atlantic Ridge.
• Red Sea Rift.
• Baikal Rift Zone.
• East African Rift.
• East Pacific Rise.
• Gakkel Ridge.
• Galapagos Rise.
• Explorer Ridge.

Where is a divergent boundary?

mid-ocean oceanic ridges

Divergent boundaries are spreading boundaries, where new oceanic crust is created to fill in the space as the plates move apart. Most divergent boundaries are located along mid-ocean oceanic ridges (although some are on land).

What is geological features of divergent?

Effects that are found at a divergent boundary between oceanic plates include: a submarine mountain range such as the Mid-Atlantic Ridge; volcanic activity in the form of fissure eruptions; shallow earthquake activity; creation of new seafloor and a widening ocean basin.

How do divergent boundaries form volcanoes?

At a divergent plate boundary – also known as a constructive plate boundary, the plates move apart from one another. When this happens the magma from the mantle rises up to make (or construct) new crust. The movement of the plates over the mantle can cause earthquakes. Rising magma can also create shield volcanoes .

What landforms are created at divergent boundaries?

At DIVERGENT boundaries the plates move apart allowing molten magma to rise and form new crust in the form of ridges, valleys and volcanoes. Landforms created by divergent plates include the Mid Atlantic Ridge and the Great African Rift Valley.

How do divergent boundaries cause earthquakes?

Earthquakes at divergent plate boundaries occur as new crust is created and other crust is pushed apart. This causes the crust to crack and form faults where earthquakes occur. Most earthquakes at divergent plate boundaries occur at mid-ocean ridges where two pieces of oceanic crust are moving away from each other.

Do divergent plates create volcanoes?

Volcanoes are most common in these geologically active boundaries. The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries.

Are Mountains convergent or divergent?

convergent plate boundaries

Mountains are usually formed at what are called convergent plate boundaries, meaning a boundary at which two plates are moving towards one another. This type of boundary eventually results in a collision.

Are trenches convergent or divergent?

In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.

What type of lava is in a composite volcano?

felsic

Composite volcano magma is felsic, which means it contains silicate-rich minerals rhyolite, andesite, and dacite. Low-viscosity lava from a shield volcano, such as might be found in Hawaii, flows from fissures and spreads.

Was Mt Everest a volcano?

Mount Everest is a volcano located in the Himalayas. It is the highest mountain on Earth, and is also the world’s highest mountain peak. Mount Everest is classified as a stratovolcano, meaning that it is composed of alternating layers of ash and lava.

What is the weakest volcano?

Within these wide-defining eruptive types are several subtypes. The weakest are Hawaiian and submarine, then Strombolian, followed by Vulcanian and Surtseyan. The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called Ultra-Plinian.

Where do lava and ash create landforms?

When lava has high viscosity, it produces ash, cinders, and bombs, which all build up around the vent in a steep, cone-shaped hill or small mountain. A composite volcano, or a stratovolcano, is a tall, cone-shaped mountain in which layers of lava alternate with layers of ash.

What volcano has ash cinders and bombs?

composite volcano

A cinder cone is a steep, cone-shaped hill or small mountain. It forms when a volcano erupts explosively. Ashes, cinders, and bombs pile up around the vent. A composite volcano is a tall, cone-shaped mountain.

What is meant by Ring of Fire?

The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth’s volcanoes and earthquakes take place along the Ring of Fire.

Which type of volcano is the most violent and explosive *?

Stratovolcanoes

Stratovolcanoes are considered the most violent. Mount St. Helens, in Washington state, is a stratovolcano that erupted on May 18, 1980.

How deep is a volcano hole?

If the magma finds a path to the surface, then the result will be a volcanic eruption; consequently, many volcanoes are situated over magma chambers. These chambers are hard to detect deep within the Earth, and therefore most of those known are close to the surface, commonly between 1 km and 10 km down.

How much lava is in a volcano?

Using the preliminary map, we can calculate a rough estimate of the total volume of lava erupted and added to the land surface—about 0.8 cubic kilometers (over a million cubic yards).

Why are lava domes viscous?

This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite.

Can shield volcanoes erupt?

Most shield volcano eruptions are nonexplosive (effusive), usually 0-1 on the Volcanic Explosivity Index (VEI), typically in the Hawaiian eruptive style. These eruptions produce fluid lava flows and may produce fire-fountains. High rates of eruptions help produce lava flows that travel fast and can cover large areas.

What type of volcano is caldera?

A caldera is a depression created after a volcano releases the majority of the contents of its magma chamber in an explosive eruption. Without any structural support below, the land around the erupting volcanic vent or vents collapses inwardly, creating the bowl-shaped caldera.

What type of volcano is tall?

Composite volcanoes

Composite volcanoes are tall, symetrically shaped, with steep sides, sometimes rising 10,000 feet high. They are built of alternating layers of lava flows, volcanic ash, and cinders.

Are there any volcanoes in the UK?

There are no active volcanoes in the United Kingdom of Great Britain and Northern Ireland, although a few do exist in some British Overseas Territories, including Queen Mary’s Peak in Tristan da Cunha, Soufrière Hills volcano on the Caribbean island of Montserrat, as well as Mount Belinda and Mount Michael in the …

What kind of volcano is Yellowstone?

supervolcano