While there isn't a specific type of rock officially called "fiery rocks," the term likely refers to igneous rocks.

Here's why:

* Formation: Igneous rocks are formed from the cooling and solidification of magma (molten rock) or lava (molten rock that has erupted onto the Earth's surface).

* Heat: The process of magma and lava cooling involves intense heat, leading to the "fiery" association.

* Appearance: Some igneous rocks, like obsidian, can have a dark, glassy appearance that evokes a sense of fire.

So, while "fiery rocks" isn't a standard geological term, it's a good way to describe igneous rocks in a more descriptive and evocative way.