Definitions

1. verb

to convert or cause to become into a form of silica, especially by replacement of other minerals

“The rainwater silicified the fossils, preserving them for millions of years.”

2. verb

to impart a siliceous or glassy appearance to

“The mineral deposits silicified the surrounding rock formations.”

3. noun

the process of converting or causing to become into a form of silica

“The geologist studied the silicification of the ancient rock formations.”