Slow cooling refers to the gradual reduction of temperature in a material, often allowing for more uniform solidification. This process is commonly used in metallurgy and glassmaking, where controlled cooling can enhance the strength and durability of the final product. By cooling slowly, the internal structure of the material can adjust, reducing the risk of defects. In the context of geology, slow cooling occurs when molten rock, or magma, cools beneath the Earth's surface. This process leads to the formation of igneous rocks with larger crystals, as the extended cooling time allows crystals to grow bigger. Examples include granite and gabbro, which are formed from slowly cooled magma.