THE FLOOD DEPOSITS IN THE MESOZOIC COAL-BEARING STRATA IN HENAN

Despite their widespread occurrence in the geologic record, the flood deposits have received little attention of the majority of geologists. The authors propose, on the basis of the detailed investigation, that large amounts of the flood deposits occur in the Mesozoic strata in Henan in a variety of geological environments such as flood plain, lakeshore and shallow to deep lake, flood basin in the alluvial plain envionments of meadering rivers and the frontal zone of the alluvial fan where the braided streams are well-developed. Morever, the flood deposits in different environments are of quite variable in character. The present paper deals in detail with sedimentary characteristics and conditions for the formation of the flood deposits in the study area.