Lower Permian layers in Sibumasu contain glacial-marine diamictites and Gondwanan faunas and floras which then developed independently before Sibumasu docked with Cathaysia.
Os estratos do Permiano inferior de Sibumasu conteñen diamictitas glacial-mariñas e faunas e floras de Gondwana, que despois se desenvolveron independentemente antes de que Sibumasu atracase en Cataisia.