diff --git a/src/java/mmm/world/I_WBiomeWithOres.java b/src/java/mmm/world/I_WBiomeWithOres.java
new file mode 100644
index 0000000..62ef805
--- /dev/null
+++ b/src/java/mmm/world/I_WBiomeWithOres.java
@@ -0,0 +1,14 @@
+package mmm.world;
+
+
+import mmm.world.gen.WGOreParameters;
+import net.minecraft.world.World;
+
+
+
+public interface I_WBiomeWithOres
+{
+
+	public WGOreParameters[] getBiomeOres( final World world );
+
+}
diff --git a/src/java/mmm/world/WLocationInBiome.java b/src/java/mmm/world/WLocationInBiome.java
index 65f9400..f56c1b3 100644
--- a/src/java/mmm/world/WLocationInBiome.java
+++ b/src/java/mmm/world/WLocationInBiome.java
@@ -24,7 +24,7 @@ public class WLocationInBiome< T extends Biome >
 	public boolean checkLocation( final World world , final int chunkX , final int chunkZ ,
 			final IChunkProvider provider )
 	{
-		final Biome biome = world.getBiomeGenForCoords( new BlockPos( chunkX , 0 , chunkZ ) );
+		final Biome biome = world.getBiomeGenForCoords( new BlockPos( chunkX * 16 , 0 , chunkZ * 16 ) );
 		return this.biomeType.isAssignableFrom( biome.getClass( ) );
 	}
 
diff --git a/src/java/mmm/world/biome/A_WBLimestone.java b/src/java/mmm/world/biome/A_WBLimestone.java
index a7095a7..05a92e0 100644
--- a/src/java/mmm/world/biome/A_WBLimestone.java
+++ b/src/java/mmm/world/biome/A_WBLimestone.java
@@ -3,8 +3,14 @@ package mmm.world.biome;
 
 import java.util.Random;
 
+import com.google.common.base.Predicates;
+
+import mmm.materials.Materials;
+import mmm.world.I_WBiomeWithOres;
 import mmm.world.I_WDefaultPopulateHandler;
 import mmm.world.gen.WGLimestoneLayer;
+import mmm.world.gen.WGOreParameters;
+import net.minecraft.block.state.pattern.BlockMatcher;
 import net.minecraft.init.Blocks;
 import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
@@ -16,7 +22,7 @@ import net.minecraftforge.event.terraingen.PopulateChunkEvent;
 
 public abstract class A_WBLimestone
 		extends Biome
-		implements I_WDefaultPopulateHandler
+		implements I_WDefaultPopulateHandler , I_WBiomeWithOres
 {
 
 	public A_WBLimestone( BiomeProperties properties )
@@ -28,7 +34,6 @@ public abstract class A_WBLimestone
 	@Override
 	public void decorate( final World worldIn , final Random rand , final BlockPos pos )
 	{
-		System.err.println( "GEN " + this.getBiomeName( ) + " AT " + pos );
 		super.decorate( worldIn , rand , pos );
 		new WGLimestoneLayer( ).generate( worldIn , rand , pos );
 	}
@@ -56,4 +61,16 @@ public abstract class A_WBLimestone
 		return true;
 	}
 
+
+	@Override
+	public WGOreParameters[] getBiomeOres( final World worldIn )
+	{
+		return new WGOreParameters[] {
+				new WGOreParameters( Materials.ROCK_CHALK.getDefaultState( ) , 15 , 20 , //
+						worldIn.getSeaLevel( ) - 20 , 255 , //
+						Predicates.or( BlockMatcher.forBlock( Blocks.STONE ) ,
+								BlockMatcher.forBlock( Materials.ROCK_LIMESTONE ) ) )
+		};
+	}
+
 }
diff --git a/src/java/mmm/world/gen/WGOre.java b/src/java/mmm/world/gen/WGOre.java
index 9fc2a49..9a80fbe 100644
--- a/src/java/mmm/world/gen/WGOre.java
+++ b/src/java/mmm/world/gen/WGOre.java
@@ -4,7 +4,10 @@ package mmm.world.gen;
 import java.util.ArrayList;
 import java.util.Random;
 
+import mmm.world.I_WBiomeWithOres;
+import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
+import net.minecraft.world.biome.Biome;
 import net.minecraft.world.chunk.IChunkGenerator;
 import net.minecraft.world.chunk.IChunkProvider;
 import net.minecraftforge.fml.common.IWorldGenerator;
@@ -28,6 +31,14 @@ public class WGOre
 	public void generate( final Random random , final int chunkX , final int chunkZ , final World world ,
 			final IChunkGenerator chunkGenerator , final IChunkProvider chunkProvider )
 	{
+		System.err.println( "GEN ORES " + chunkX + " / " + chunkZ );
+		final Biome biome = world.getBiomeGenForCoords( new BlockPos( chunkX * 16 , 0 , chunkZ * 16 ) );
+		if ( biome instanceof I_WBiomeWithOres ) {
+			for ( final WGOreParameters parameters : ( (I_WBiomeWithOres) biome ).getBiomeOres( world ) ) {
+				parameters.generate( world , random , chunkX , chunkZ );
+			}
+		}
+
 		final int n = this.conditions.size( );
 		for ( int i = 0 ; i < n ; i++ ) {
 			final WGOreCondition cond = this.conditions.get( i );