diff --git a/mods/MAPGEN/mcl_biomes/init.lua b/mods/MAPGEN/mcl_biomes/init.lua
index c3a53ea0d..d468ae4f4 100644
--- a/mods/MAPGEN/mcl_biomes/init.lua
+++ b/mods/MAPGEN/mcl_biomes/init.lua
@@ -5057,6 +5057,18 @@ local function register_dimension_decorations()
 		y_max = mcl_vars.mg_nether_deco_max - 15,
 		flags = "all_floors, all ceilings",
 	})
+	minetest.register_decoration({
+		deco_type = "simple",
+		decoration = "mcl_blackstone:basalt",
+		place_on = {"mcl_blackstone:basalt","mcl_nether:netherrack","mcl_blackstone:blackstone"},
+		sidelen = 80,
+		height_max = 3,
+		fill_ratio = 0.4,
+		biomes = {"BasaltDelta"},
+		y_min = mcl_vars.mg_lava_nether_max + 1,
+		y_max = mcl_vars.mg_nether_deco_max - 15,
+		flags = "all_floors, all ceilings",
+	})
 	minetest.register_decoration({
 		deco_type = "simple",
 		decoration = "mcl_nether:magma",