Emerald Ore, which is intended to be exclusive to Mountain Biomes, is generating within the boundary of an adjacent, non-Mountain Biome (e.g., Plains, Forest, or Birch Forest). The ore is visible on the surface of a cliff face, directly at the point where the two distinct biomes meet. This indicates a generation error at the biome boundary.
-1 Vote for me.
Why would you want this removed.
That looks like a Mtn that crashed with another biome, which Could Happen on rare occassion.