The Earth's outer core is not composed of rocks. It is a liquid layer primarily made up of iron and nickel, with smaller amounts of other elements like sulfur and silicon.

Here's why:

* Extreme Pressure and Temperature: The outer core experiences immense pressure and temperatures exceeding 4,500°C (8,100°F). These conditions are far too intense for traditional rock formation.

* Liquid State: The intense heat melts the iron and nickel, creating a liquid layer.

* Convection Currents: The liquid outer core is constantly in motion due to convection currents driven by heat from the inner core.

Therefore, the terms "rock" or "mineral" are not applicable to the outer core's composition.