Silica cycleCycling of silica from the marine environment. Silicon typically occurs in mother nature as silicon dioxide (SiO2), also known as silica. It cycles from the marine environment, entering primarily through riverine runoff. Silica is faraway from the ocean by organisms which include diatoms and radiolarians that use an amorphous https://zb3.org/stonelcd/a-candid-evaluation-the-advantages-and-disadvantages-of-boron-powder