Zhaocun bentonite deposit oringnated from tuff rich in volcanic hyalocrystalline,which underwent hydrolysis and alteration in Changxing county,Zhejiang province.The deposit has middle scale.

浙江省长兴膨润土矿是由富含火山玻质凝灰岩原地水解蚀变膨润土矿床,矿床具中型规模。