Fossils in which minerals replace all or part of an organism are called?

Fossils in which minerals replace all or part of an organism are called?

• A. Cast
• B. Mold
• C. Extinct
• D. Petrified Fossils

Answer: (D)

Fossils formed when minerals replace all or part of an organism are called petrified fossils. This happens through a process called petrification or permineralization, where mineral-rich water soaks into the remains and minerals precipitate in place, turning the organic material into rock while preserving its detail. That mineral replacement makes the fossil essentially a stone replica of the original organism, like petrified wood. This differs from a mold, which is just an empty impression left after the organism decays, and a cast, which forms when that mold fills with sediment to create a solid replica. Extinct simply means a species no longer exists, not how fossils are formed.

Fossils formed when minerals replace all or part of an organism are called petrified fossils. This happens through a process called petrification or permineralization, where mineral-rich water soaks into the remains and minerals precipitate in place, turning the organic material into rock while preserving its detail. That mineral replacement makes the fossil essentially a stone replica of the original organism, like petrified wood.

This differs from a mold, which is just an empty impression left after the organism decays, and a cast, which forms when that mold fills with sediment to create a solid replica. Extinct simply means a species no longer exists, not how fossils are formed.