Here's a breakdown:

* Compression fossilization: This is the most common type of fossilization. It happens when an organism dies and is quickly buried by sediment (like mud, sand, or volcanic ash). The weight of the sediment compresses the organism, squeezing out water and gases. Over millions of years, the organism's soft tissues decompose, leaving behind only the hard parts (bones, shells, teeth). These hard parts can be preserved as impressions or molds in the rock.

Here's a simplified version:

1. Death and Burial: An organism dies and is quickly buried by sediment.

2. Compression: The weight of the sediment compresses the organism, squeezing out fluids.

3. Decomposition: Soft tissues decompose, leaving behind hard parts.

4. Mineralization: Minerals in the surrounding sediment replace the original organic material, creating a fossil.

5. Exposure: Over time, geological processes can uplift and expose the fossil.

Let me know if you would like to know more about other types of fossilization!