Veins in the combusted metamorphic rocks, Israel; Weathering or a retrograde event?

For about four decades the Hatrurim Formation (Israel, the Palestinian Authority) and its equivalent in Jordan were considered to have formed between 16 and 3Ma ago by combustion of bituminous chalks, dehydration and decarbonation, resulting in two stages: a prograde country rock of High-T, Low-P (Portland Cement-like) assemblages, and a retrograde, closely time-related stage, of concrete-like vein fillings of rehydration and recarbonation.