lithify

verb

lith·​i·​fy ˈli-thə-ˌfī 

lithified; lithifying

transitive verb

: to change to stone : petrify

especially : to convert (unconsolidated sediment) into solid rock

intransitive verb

: to become changed into stone

Word History

Etymology

lith(ification) + -ify

First Known Use

1877, in the meaning defined at transitive sense