Fossils — Fossil

Fossils are the preserved remains, impressions, or traces of ancient organisms. There are several different ways fossils can form, but here are a few of the most common:1. Mineralization: This is the most common way fossils form. When an organism dies and is buried by sediment (like mud or sand), minerals in the sediment can replace the organic material in the organism's bones or other hard parts. Over time, these minerals will harden and become rock, preserving the shape of the original organism.2. Mold and cast: Sometimes, instead of being mineralized, a fossil can leave behind a mold and a...