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The upper mantle.

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15y ago

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What is the layer of heavy rocks beneath the Earth's crust?

The upper mantle.


Where is the thinnest point of the earths crust?

It is beneath the sea an is called a ocean crust. This is the thinnest point because the ocean water is so dense (heavy) it flattens the crust (because there's millions and millions of gallons of water...... That's heavy!!!) that's why there are oil rigs at sea because it's only around 5 kilometres thick, unlike on land it's around 50 kilometres thick!!!


What is the earth's crust the outer lighter portion of?

The earth's crust is the outer lighter portion of the continental crust. The crust beneath the ocean iscomosed of heavy, dark volcanic rock. The continental crust is composed mostly of lighter rocks rich in silica such as granite.


How Metamorphic are form?

Weathered products of existing rocks are transported , deposited , compacted , and cemented.


How can such heavy things as the continents float?

Continents float because the rock beneath them is denser then the surface rocks The surface rocks are poorer in iron than the deeper layers. The continents are made mostly of silica rich rock, which is less dense than oceanic crust, so when the two come in contact, the oceanic crust sinks beneath the continent.


What kind of plate boundary cost old and heavy crust to sink in to the mantle?

A subduction zone is the plate boundary where old and heavy oceanic crust sinks into the mantle. At subduction zones, oceanic crust is forced beneath another tectonic plate, typically a continental plate, due to differences in density. This process can lead to the formation of deep oceanic trenches and volcanic arcs on the overriding plate.


Why do geologist think earths core contains mostly iron?

Other orbiting bodies contain more iron then earths crust does


What is the crusts thickness?

There are two types of crust's. I dont know which one you are talking about, but it is probably the continental crust. The other type of crust is the Oceanic crust. The first continental crust is about 4-7 miles (6-11 km) thick and mainly consists of heavy rocks, like basalt. The Continental crust is thicker than the Oceanic crust, about 19 miles(30 km) thick. It is mainly made up of light material like granite.


What contributes the lack of evidence of the period of heavy bombardment on earth?

Earths valcanoes


What contribute to the lack of the evidence of the period of heavy bombardment on Earth?

Earths volcanoes;)


Why is there so little evidence of the period if heavy bombardment on earth?

Earths volcanoes;)


What is it called when water rises to the earths surface from below during heavy rains?

This process is called water table rise, which occurs when heavy rainfall saturates the ground with water, causing the water table to rise. Excessive water accumulation can lead to flooding and potential water damage to properties on the surface.