Seismic Earthquake Liquefaction

EARTHQUAKE_LIQUEFACTION_IN is a point shapefile that shows sites where paleoliquefaction features have been identified in the field by Pat Munson of the Indiana Geological Survey and by archeologists of the Department of Anthropology, Indiana University, Bloomington. The ages of the features, which were determined by radiocarbon dating, dating of associated archaeological artifacts, and flood plain stratigraphy are all within 20,000 years before present.EARTHQUAKE_LIQUEFACTION_IN 为点位形状文件（shapefile），其涵盖了由印第安纳地质调查局的帕特·蒙森（Pat Munson）与印第安纳大学布鲁明顿分校人类学系考古学家在野外实地识别出古液化特征的所有点位。上述古液化特征的年代经放射性碳定年法、相关考古遗物断代以及河漫滩地层学分析确定，全部处于距今20000年以内。