Crypto-explosive breccia occurs at Dajingtou,Guihouzhuang,Puxiqiao etc.,and is genetically related to Mesozoic Tongshi complex.

• 大井头地区隐爆角砾岩主要分布在大井头、归后庄和埠西桥等地,隐爆角砾岩与中生代形成的铜石杂岩体具有成因关系。