Keywords: 
• ancient earthquake records

Abstract: Three main characteristics of ancient earthquakes are demonstrated in this paper. They are macrostructures, microstructures, and geochemical abnormal. There are differences of earthquake records in various lithogeographic environments. It is recognized that the formation factors caused by water escape fillings so called molar tooth structures either in clastic rocks or in carbonate rocks, such as sand liquefaction and sand bed slump structures so common in lacustrine, lagoon and tidal flats but molar tooth structures widely distributed in carbonate rocks related with marine ramp environment due to tempsite beds always containing more water. Besides, volcanic crystals, tuffs, or pseudomorphic volcanic glasses could be company with earthquake records beds need pay attention to collection of samples for geoage determination.