The drastic lithofacies change of the Dahongyu Formation in less than 4 km within the Ming Tombs District of Beijing is a phenomenon rarely seen both in China and abroad, From east to west, there are Tailing section composed of grey brecciated silicified rock black silty tuffaceous shale yellow feldspar-bearing quartz sandstone, the hill top section consisting of impure sandstone muddy dolostone, and the Deshengkou section comprising muddy dolostone quartz sandstone tuyffite. As the last two sections have been discussed before, this paper deals mainly with the Tailing section. According to macroscopic, microscopic, geochemical, and isotopic geochemical data, the authors hold that the grey brecciated silicified rock and black silty tuffaceous shale were formed under the influence of volcano-seismic event, thus serving as a kind of event message-bearing rock, whereas the overlying yellow feldspar-bearing quartz sandstone was formed in a normal littoral environment. A model for the event message-bearing rocks of the Dahongyu formation is advanced in this paper.