The lack of vegetation and varied color of the sedimentary layers clearly illustrates that tilted layers underlie the Earth’s surface and form the mountain ranges, but the nature of the process of tilting and erosional exposure, as well as what the layers do far below the surface, is less obvious. The real Keping fold-thrust belt essentially formed in the same way; a sequence of sedimentary layers was shortened against a thick, mechanically stronger mountain belt core by movement of the underlying tectonic plates. I tried to scale the overall thickness and length of the layer pack, along with individual layer thicknesses and colors, to match up closely to parts of the real Keping fold-thrust belt.