where does ancient debris spawn

Ancient debris in Minecraft spawns exclusively in the Nether dimension. It most commonly generates around Y-level 14 to 15, with Y=15 being the peak level for finding it. The spawn rate decreases significantly above Y=22 and below Y=10, making Y=14-15 the optimal mining levels. Ancient debris appears as scattered ores embedded in netherrack and never naturally exposed to air. It tends to spawn at the edges of loaded chunks in the Nether. Mining at these levels, especially using strip mining combined with explosives, is an effective way to find ancient debris