Density of Basalt: 2.8 - 3.0 g/cm³

Density of Granite: 2.6 - 2.7 g/cm³

Explanation:

Basalt is an extrusive igneous rock that is rich in magnesium and iron, which are denser elements than the silica and potassium that make up granite. The denser minerals in basalt contribute to its higher overall density.

Other factors that influence density:

* Mineral composition: The specific minerals present in the rock affect its density.

* Porosity: Rocks with more pores or spaces will have lower density.

* Crystallization: The degree of crystallization can also influence density.

In summary:

Basalt's higher content of denser elements, such as magnesium and iron, makes it denser than granite.