The crust and the upper layer of the mantle together make up a zone of rigid, brittle rock called the Lithosphere. The layer below the rigid lithosphere is a zone of asphalt-like consistancy called the Asthenosphere. The asthenosphere is the part of the mantle that flows and moves the plates of the Earth.
What is the name of the boundary layer between the crust and the rigid mantle?
The boundary between the crust (continental or oceanic) and the underlying mantle is known as the Mohorovičić discontinuity (also called Moho), which is named for its discoverer, Croatian seismologist Andrija Mohorovičić.
What is a rigid block of crust and upper mantle?
lithosphere, rigid, rocky outer layer of the Earth, consisting of the crust and the solid outermost layer of the upper mantle. It extends to a depth of about 60 miles (100 km). It is broken into about a dozen separate, rigid blocks, or plates (see plate tectonics).
What makes up Earth’s crust and upper mantle?
Lithospheric crust is characterized by gneiss (continental crust) and gabbro (oceanic crust). Below the Moho, the mantle is characterized by peridotite, a rock mostly made up of the minerals olivine and pyroxene. The asthenosphere is the denser, weaker layer beneath the lithospheric mantle.
What is the relationship between crust and lithosphere?
The relationship between the crust and the lithosphere is that the crust makes up the upper portion of the lithosphere.
What are the relationship among the mantle the crust the asthenosphere and the lithosphere?
Both the lithosphere and asthenosphere are part of Earth and are made of similar material. Lithosphere is made up of Earth’s outermost layer, the crust, and the uppermost portion of the mantle. In comparison, the asthenosphere is the upper portion of Earth’s mantle (which is also the middle layer of Earth).
Which of the following marks the boundary between the mantle and the core?
depth. The mantle–core boundary is the Gutenberg discontinuity at a depth of about 2,800 kilometres. The outer core is thought to be liquid because shear waves do not pass through it.
What is the nature of the boundary between the lithospheric mantle and the asthenosphere?
The lithosphere-asthenosphere boundary, or LAB, represents the transition from hot, convecting mantle asthenosphere to overlying cold and rigid lithosphere. The oceanic lithosphere thickens as it cools over time, and eventually sinks back into the mantle at Earth’s so-called subduction zones.
What is the upper mantle made of?
Upper mantle material that has come up onto the surface comprises about 55% olivine and 35% pyroxene, and 5 to 10% of calcium oxide and aluminum oxide. The upper mantle is dominantly peridotite, composed primarily of variable proportions of the minerals olivine, clinopyroxene, orthopyroxene, and an aluminous phase.
What is the lower mantle made of?
composition of Earth’s interior
(1,800 miles), consists of the lower mantle, which is composed chiefly of magnesium- and iron-bearing silicates, including the high-pressure equivalents of olivine and pyroxene.
What happens when oceanic and continental crust meets?
When oceanic crust converges with continental crust, the denser oceanic plate plunges beneath the continental plate. This process, called subduction, occurs at the oceanic trenches (figure 6). The entire region is known as a subduction zone. Subduction zones have a lot of intense earthquakes and volcanic eruptions.
Which 2 layers make up the mantle?
Earth’s mantle is divided into two major rheological layers: the rigid lithosphere comprising the uppermost mantle, and the more ductile asthenosphere, separated by the lithosphere-asthenosphere boundary.
What is mantle answer?
The mantle is the widest layer of the earth at approximately 2900km thick, it makes up about 85% of the Earth’s weight. It lies between the Earth’s thin outer layer, the crust and the super-heated outer core. The mantle is made up of a semi-molten rock called magma.
How does the upper mantle differ from the lower mantle?
The Mantles
They have the upper mantle and the lower mantle. There are very small differences between the two layers. The upper mantle has Olivine (a very special rock), compounds with silicon dioxide, and a substance called Peridotite. The lower mantle is more solid than the upper mantle.
What would be the correct relationship between the crust and the lithosphere quizlet?
What would be the correct relationship between the crust and the lithosphere? The crust is part of the lithosphere and is the top layer of the lithosphere. You just studied 16 terms!
Are crust and lithosphere the same?
The lithosphere includes the crust (whether continental or oceanic) and the uppermost part of the upper mantle.
Do crust and lithosphere refer to the same layer of the Earth?
The lithosphere includes both the crust and upper, solid mantle. Crust and lithosphere refer to the same layer of the Earth.
ncG1vNJzZmivp6x7or%2FKZp2oql2esaatjZympmenna61edmopZ5llKSytHnToZxmm6KqwLV5wKebZq2gpbKzecyapa2klWK6orfEZqypZZOdsqS3jKKrZqelqXq1tMRmmquto6l6orrDZquhnV2qvbGx0WajmrGVp3qwsoytn55lnZa7tbjEZquon5Wptaa%2BjKaYpJ1dqr1urYyzpqedXaSzbr7IoKCdZZKntrXAy55kq6eToHqkrculnJ1n