granted by National Nature Science Foundation of China(41472082,41402100,49772121,40172044,and 41173065);Institute of Geology,Chinese Academy of Geological Sciences,ChinaGeological Survey(DD20190448 and DD20190370).
This study covers cosmic spherules derived from the Mesoproterozoic Dahongyu Formation in the Ming Tombs area, Beijing. The cosmic spherules include iron oxide cosmic spherules, carbonaceous chondrites, and atomic iro...