Volcanic Beaches

I suggest that there could be a biome known as Volcanic Beaches, where the beaches could be made out of Volcanic Sand, a powderlike block affected by gravity, with a texture like black colored sand. there couls also be small 3-2 block tall smooth basalt boulders, lining the coast.

This biome would add more variety to the coasts, and make it easier to access the Basalt block without going to the dangerous basalt deltas.

Constructive Critisism would be greatly appreciated.