This is the second layer according to the chemical composition of the Earth, as described by with Seuss.
It has the following characteristics.
1. This layer is made from silica and magnesium.
2. Density of this layer is 2, 9 – 4, 7. grams per cubic cm.
3. This layer extends to the depth of 1000-2000 km.
4. It has a dominance of alkaline elements.
5. The lava emerges from this layer during the eruption of a volcano.
