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.

浙兴县赵村膨是由富含火山玻质的凝灰岩原地水解蚀变形成的膨床,床具中型规模。