The amount of pore space in most unweathered granite is too small to support a plant-based ecosystem. But porosity grows as intact rock interacts with surface waters beneath the soil. You have ...

For geologists, a continent is a large area of thick continental crust composed of granite or similar igneous rocks, forming the continental base, in combination with metamorphic rocks ...

It was thought to require Earth-like conditions ... it’s quite hard to make granite without water and plate tectonics, which is why we really don’t see that type of rock on other planets ...