What occurs on the transition zone?

What occurs on the transition zone?

The mantle transition zone (TZ) is the layer between two discontinuities in seismic wave-speed that lie at depths of approximately 410 km and 650 km [Anderson, 1989]. These discontinuities are polymorphic phase changes, caused by pressure-induced changes of crystal structure in certain minerals [Anderson, 1967].

What is an example of a transition zone?

Transition zone (Earth), a part of the Earth’s mantle located between the lower mantle and the upper mantle. Transition zone, the region between the near and far fields of a transmitting antenna. Transition zone (TZ), a glandular region of the prostate— see Prostate#Zones.

What is the transition zone between mantle and core?

The mantle –core transition zone is called Gutenberg discontinuity. In the year of 1912 Weichert Gutenberg was discovered this discontinuity at the depth of 2900km beneath the earth surface. In this zone the velocity of seismic waves changes suddenly.

Is the transition zone a solid or liquid?

The mantle transition zone (MTZ) is an ∼250-km-thick boundary layer delimited by two seismic interfaces, the so-called 410- and 660-km discontinuities, which are attributed to solid-solid phase changes from olivine (ol) to wadsleyite (wa) and ringwodite (rw) to perovskite+magnesiowustite (ppv+mw; Bina & Helffrich, 1994 …

Where is the transition zone of the earth?

The transition zone is part of the Earth’s mantle, and is located between the lower mantle and the upper mantle, between a depth of 410 and 660 km (250 to 400 mi). The Earth’s mantle, including the transition zone, consists primarily of peridotite, an ultramafic igneous rock.

What river flows through the transition zone?

the Nile River
In this case, the African Transition Zone separates the Sahara Desert environment and peoples of North Africa, from the tropical rain forests of Central Africa. It stretches all the way from the western coast to the eastern coast. Parts of the Nile River also pass through the zone.

Where is the transition zone of the Earth?

What is the transition zone in the ocean?

The waters of most of the world’s oceans are stacked like the layers of a cake. Each layer is a different temperature. The top layer is warm, the bottom layer is cold, and the layer in the middle is a transition zone — the region with the biggest change in temperature. That layer is known as the thermocline.

What is the transition zone at the base of the crust?

The Mohorovičič discontinuity (geologists call it “the Moho” for short) is the transition zone at the base of the crust. In this small zone, the seismic waves speed up; this indicates that the rocks are becoming denser in the next layer, which is called the mantle.

What are the main transitions that the African transition zone represents?

The African Transition Zone creates the southern boundary for North Africa. This zone serves as the transition between the arid type B climates and the tropical type A climates. It is also the transition between the dominance of Islam and the dominance of Christianity and animism.

What makes the transition zone unique?

The African Transition Zone is unique because it is centrally located between Europe, the Middle East, and Asia. Therefore, the region has been known for its trade and cultural exchange since ancient times.

What is thermocline layer?

A thermocline is the transition layer between the warmer mixed water at the surface and the cooler deep water below. It is relatively easy to tell when you have reached the thermocline in a body of water because there is a sudden change in temperature.

What are the layers of the Earth?

The Layers Of Earth. Earth comprises four separate layers. Most of the geologist believes that as the Earth cooled, the heavier and the denser material sank into the centre, and the lighter ones rose towards the top.

What is the transition region of the atmosphere?

The Transition Region. Heat flows down from the corona into the chromosphere and in the process produces this thin region where the temperature changes rapidly from 1,000,000°C (1,800,000°F) down to about 20,000°C (40,000°F). Hydrogen is ionized (stripped of its electron) at these temperatures and is therefore difficult to see.

What are the layers of the atmosphere in order?

Diagram of the layers within Earth’s atmosphere. Credit: NASA Earth’s atmosphere has five major and several secondary layers. From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere. Troposphere.

What is the transition region of the Sun?

The transition region is a thin and very irregular layer of the Sun’s atmosphere that separates the hot corona from the much cooler chromosphere.