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Much of the upper mantle thought to be made of granite true or false?
False. The upper mantle is believed to be composed primarily of peridotite.
Why is mantle hotter and denser than the crust?
The mantle is closer to the molten core of earth, so it is constantly heated by it. The crust is exposed to the atmosphere, which has some cooling effect, and the crust is, of course farthest from the core.
Why were the first continents made from granite?
The older, basaltic rocks that formed on the Earth before granite first developed were to easily weathered by the ocean to form permanent continents. The ocean floor is made of basalt, but when basaltic formations extended to the surface of early oceans, they were quickly weathered away. Granite first formed when underwater volcanoes erupted, and the magma was cooled extremely quickly, forming a less dense, but much more durable, rock than basalt. These early granite formations served as the "anchors" for the early continents to form upon. In short, granite was the most durable form of rock to develop on early Earth, and, as such, it provided a durable place for the continents to develop on, safe from the erosive forces of the early oceans.
What layer lies beneath the lithosphere?
The asthenosphere.
Peridotite which is composed almost entirely of dark silicate minerals and is believed to make up much of Earth and upper mantle has a composition that is .?
ultramaficur welcome 🥴
Much of the upper mantle thought to be made of granite true or false?
False. The upper mantle is believed to be composed primarily of peridotite.
Do continents drift slowly on earths upper mantle or earths core?
Continents drift on top of the upper mantle. The core is much further down.
What buildings are made out of granite?
the older ones are made out of granite. people dnt use granite much anymore.
What is the difference between lithosphere and asthenosphere?
The difference between the lithosphere and the asthenosphere is that the asthenosphere is the lower part of the upper mantle it behaves like a plastic but flows much more easily than the rest of the mantle. The lithosphere however, includes the entire crust and the uppermost part of the mantle, it is more rigid and brittle and doesn't flow.
Why is mantle hotter and denser than the crust?
The mantle is closer to the molten core of earth, so it is constantly heated by it. The crust is exposed to the atmosphere, which has some cooling effect, and the crust is, of course farthest from the core.
How does the earths mantle differ from its crust?
Inner core: 2450 km thick Outer core: 2300 km thick Lower mantle: 2500 km thick Upper Mantle: 400 km thick continental crust: 30-70 km thick Oceanic Crust: 6 km thick
What can granite be made in to?
Kitchen countertops, fireplaces, tiles, flooring, gravestones, and much much more
How much degrees is the upper mantle?
The upper mantle is a hot area of earths interior that is less dense than the lower mantle. It goes from 250 kilometers to 600 kilometers or150 miles to 400 miles. Its composition is Silicon Oxygen Iron and Magnesium. It is a liquid.
How much is the value of a then now 1993 upper deck mickey mantle number tn17?
Less than 50 cents.
How much is an autographed picture of Mickey Mantle worth?
Depends on who certified it. An Upper Deck Mantle photo has a market rate between $500 to $1000 depending on the quality of photo and clarity of autograph.
What is the mantle of the earth?
Earth's mantle is a zone of hot molten rock beneath its solid crust. It is fluid, but quite viscous, so it flows slowly. It is almost twice as dense as granite. That is why we find so much granite in rocks and mountains here on the surface. Lighter rock floats on top of heavier rock. This is good news for land-dwellers like us. The minerals and compounds found on Earth's surface can be found in rock from the upper mantle; however, we only know well the mantle rock that has reached the surface. Mantle rock reaches the surface in several places through fissures in the crust and volcanoes. The molten mantle of Earth contains a higher abundance of heavy elements, like iron and nickel, than does its surface. Mineral compounds obey the same rule as the elements: Lots of aluminum and silicon near the surface, and olivine and pyroxine minerals and heavy elements farther down. Current theory suggests that the Earth's hot flowing mantle will provide us our magnetic shield against the Sun's harsher radiation for more than a billion years to come.
What is is the meaning of Earth's lower mantle?
The lower mantle is the portion of the Earth's mantle layer that extends from a depth of 670 km to 2798 km from the surface. Minerals present in the rock of the upper mantle become unstable at these depths. Little is known about the lower mantle other than that seismic waves indicate it is fairly homogenous in lithology and therefore density.
