fossilisation

noun
  1. The process through which organic material is preserved by being replaced with minerals over a long period, resulting in a fossil. noun
    The fossilisation of the dinosaur bones took millions of years.
    Fossilisation can occur when an organism is buried quickly after death, protecting it from decay.
  2. The process of becoming outdated or obsolete, often used metaphorically to describe ideas, practices, or institutions. noun
    The fossilisation of the company's policies has made it difficult for them to adapt to new market trends.
    There is a risk of fossilisation in any organization that resists change and innovation.