lithify
[lith-uh-fahy]
verb (used with object), lith·i·fied, lith·i·fy·ing.
to change (sediment) to stone or rock.
verb (used without object), lith·i·fied, lith·i·fy·ing.
to become lithified.
Origin of lithify
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019