adj] Composed of silica (silicon dioxide, SiO2), which occurs in nature as chert, quartz, flint, and agate.
Of or relating to rocks or sediments that contain silica and are acid
An adjective applied to rocks that contain silica, an oxide of silicon such as quartz.
Of, relating to, or derived from silica; containing or resembling silica or a silicate; silicic. Also spelled silicious.
Generally refers to a rock rich in quartz.
Containing, resembling, relating to, or consisting of silica (a clear crystalline compound, Silicon Dioxide).
A material containing silica.
A rock containing an abundance of quartz.
Containing abundant silica;
Containing a large percentage of silica.