Results of the zircon ages and possible protolith lithologies and their corresponding first-order similarities between the rock units from Myrow et al. have generally discredited this model. To begin with, the Greater Himalaya yields younger detrital zircon ages than that of Lesser and Tethyan Himalaya, which makes it very unlikely for Greater Himalaya to be a topographic high that separates two depositional basins. All the evidence that supports the passive margin model is also problematic for this model, since the strong paleontological, lithological, and sedimentological relationships between Lesser and Tethyan Himalaya basically rejects the connotation that they were once separated. Missing suture zone rocks in the Main Central Thrust also makes it difficult to explain this model.