Rocks that originated from the liquid phase are classified as

Rocks that originated from the liquid phase are classified as "Igneous Rocks".

Here are the steps of how they are formed:

1. Magma Formation: The process begins with the melting of rocks in the Earth's mantle and crust due to high temperature and pressure. This forms magma, a molten or semi-molten rock material.

2. Magma Ascent: The magma rises towards the Earth's surface because it is less dense than the surrounding rocks.

3. Magma Cooling: As the magma nears the surface, it starts to cool and solidify.

4. Crystallization: If the cooling process is slow, large crystals form in the rock. If the cooling process is rapid, small crystals or no crystals form.

5. Formation of Igneous Rock: The final solidified magma forms igneous rock.

There are two main types of igneous rocks: intrusive and extrusive. Intrusive igneous rocks form from magma that cools slowly beneath the Earth's surface, resulting in large crystals. Extrusive igneous rocks form from lava that cools quickly on the Earth's surface, resulting in small or no crystals.