Crossword clue: the process of converting, or of being converted, into a fossil.
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
becoming inflexible or out of date
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Similar clues
the act or process of converting or being converted to a true christianity.
50% similar
→ christianization