ORES

The positions of coal, iron, gold and diamond are calculated by this real life data (external link).

Don’t worry, all Minecraft ores are still available in all biomes like before (generated by Minecraft with vanilla distribution), but this adds some additional places, where you can find this items a lot easier and in higher amounts. It’s time for Gold Rush, isn’t it?

Here you get an overview of the additional distributions of each material:

Coal
Iron
Gold
Diamond