Rocks high in silica produce silicic acid as a weathering product.
From the en.wikipedia.org
The water was rich in silicic acid, so the bloom was dominated by phytoplankton called diatoms.
From the newscientist.com
Vacuum insulation panels consist of a tightly sealed shell and porous core material made of silicic acid.
From the sciencedaily.com
Unusually, diatoms have a cell wall composed of silicic acid.
From the en.wikipedia.org
Higher organisms are only known to use it in very limited occasions in the form of silicic acid and soluble silicates.
From the en.wikipedia.org
T. aurantia does this using an enzyme called silicatein to catalyse the conversion of silicic acid in seawater into its silica spikes.
From the newscientist.com
But in the area where the researchers were working natural blooms had already depleted much of the silicic acid, which the diatoms use for shellmaking.
From the economist.com
Other factors that can affect diatoms include rising temperatures and falling levels of silicic acid, which diatoms need to build cell walls.
From the newscientist.com
Keele researchers found that callose initiated silica formation in undersaturated solutions of silicic acid and catalysed silica formation in saturated solutions of silicic acid.