Can basalt and granite coexist?

Sure but they'd be in separate layers and different age. Basalt is a very fined grained igneous rock that's created fast. Why do we know this? Because of the grain sizes in the rock. read more

The earth is 4 billion years old, and any kind of rock can form just about anywhere. There is no reason for some existing rock to preclude the later existence of a different sort of rock. Also, since both those lithologies are igneous rocks, they may certainly form in the same igneous province. read more

Granite appears to be veined or pebbled whereas basalt appears dull and soft. Also the mineral composition of rocks is different. Granite and Basalt are used for different purposes. Also, Granite and Basalt differ in properties. read more

Granite is an intrusive rock with few contaminants, while basalt is an extrusive rock with many contaminants. Granite is the principal component of the continental crust, while basalt is the principal component of the oceanic crust. read more