Sima density refers to the density range of the geological layer known as Sima, which corresponds to the Earth's mantle. Based on geological studies, the density of the Sima layer varies significantly.
Understanding Sima
The term "Sima" is derived from its primary constituent elements: Silica and Magnesium. It represents the vast layer surrounding the Earth's core, commonly known as the Mantle.
- Composition: Primarily composed of basic silicates, rich in Magnesium and Silicon.
- Location: Lies directly beneath the Earth's crust and above the core.
- Thickness: The Mantle (Sima) is a substantial rock shell, approximately 2900 kilometers thick.
The Density Range of Sima
According to geological data, the density of the Sima layer is not uniform throughout its thickness. It increases with depth due to pressure and temperature variations.
The density range of the Sima layer (Mantle) is stated to vary from 3.3 to 5.7.
| Layer Designation | Primary Composition | Approximate Thickness | Density Range (g/cm³) |
|---|---|---|---|
| Sima (Mantle) | Silica, Magnesium | ~2900 km | 3.3 to 5.7 |
This increasing density with depth is a fundamental characteristic of the Earth's internal structure, driven by gravitational compression.
