Stone probability And richness

This mod for Factorio is primarily designed to correct a parameter of the AlienBiomes mod, but the changes made are also intended to work with the base game. This mod adjusts the probability of rock appearance and their richness in resources. The mod distinguishes between rocks that are purely decorative and rocks containing resources (large stones) that can be adjusted separately in terms of their probability of appearing on the map. The mod also allows for separate adjustments of the coal and stone rates present in these rocks. AlienBiomes tends to significantly increase the quantity of rocks and their richness, with many rocks rich in coal and stone, which is a novelty and makes the early game much easier. To fully enjoy AlienBiomes while adjusting this, I recommend lowering the presence of minable rocks (to 0.25 for example) and decreasing the amount of coal found in these rocks.