Figure 33-Speculative cross section for model I and reconstruction (in sequence [animation]) based on frame section (Figure 32). Reduced and squeezed from true-scale original; only selected stages are shown. Salt is shown in black. Base of Sigsbee salt mass is connected directly to the autochthonous Louann salt layer. This model is rejected in favor of model II (Figure 34, Figure 35). Reconstruction is by the PREP method.