Almost 2900 km thick.
410km
Earths mantle is less dense and very hot. The mantle is 2885km thick.
The Earth's mantle is about 2,890 km (or 1,800 mi) thick.
The earths mantle is one of the four major layers, laying between the crust and the outer core. At 2885 kilometers, it is the thickest layer.
The thickness of the mantle is about 2891km thick according to the USGS. Checkout the website to learn more about the Earth's interior. http://pubs.usgs.gov/gip/interior/
It is 2,900 kilometers
there are 7 layers in earths mantle.
the mantle
the crust is the thickness of earths layers
The thickness of the Earth's mantle is about 2900 km and it's upper boundary is about 100km deep. There is a really cool cutaway drawing available by using the Wikipedia link.
the earth's mantle is brown
mantle