Is there the ability to have multiple blocks serve as the Hard Block?

[spaseksplorer]

I'm wondering if it is possible to create a weighted list of blocks that can be sampled when replacing the far blocks not in caves, similar to how CoFH world does their ore gen stuff.
Ex.:
S:"Hard Block"= [
{"name": "minecraft:cobblestone", "weight":15},
{"name": "minecraft:ice", "weight":5},
{"name": "minecraft:packed_ice", "weight":5},
{"name": "minecraft:snow", "weight":10},
{"name": "minecraft:stone", "weight":65}
]