This paper describered rock features and Lithofacies formations of the Middle Devonian Epoch and Carboniferous Period

and Summed up much evidence of turbidity current sediments: flyschoid formation; graded bedding; convolete lami- nation; radiolarian silicalite; terrigenous minerals (feldspar and quartz) being edges and corners

sub-edges and corners

marine facies fossils mixing with that of con- tinental facies. There are short of fossils and broken. We think turbidity current sediments were getting on the deep sea plain and the arc of islands which lay on from continental slope to trench. This paper points out the meaning of turbidity current sediments in resuming palaeogeographic environments

delimlting tectonic plate boundary and ore-finding

prospecting gold deposits and petroleum.