Cosh

{
	"populate": {
		"sulfur": {
			"distribution": "underfluid",
			"genFluid": "lava",
			"generator": {
				"block": "railcraft:ore",
				"material": {"name": "chisel:basaltextra", "metadata": 7},
				"cluster-size": 3
			},
			"cluster-count": 4,
			"min-height": 0,
			"max-height": 10,
			"retrogen": "false",
			"biome": "all",
			"dimension": {
				"restriction": "blacklist",
				"value": [
					-1,
					1
				]
			}
		}
	}
}