In the model, the green and blue layers are stronger than the white layers, whose weakness allows the green layers to be squeezed together in the tight anticline. Below, the tightly buckled and faulted dark red layers generally follows the waveform of the deeper structure, but hosts several small anticlines and synclines above a single deeper anticline. The complex structures in the three models above develop due to the strongly contrasting layer strengths in the models’ layer packs.