Fossil

The process of fossilization that involves mineral-rich water percolating through the pores of decomposed organic matter is called petrifaction. In this process, the organic material is gradually replaced or filled with minerals, effectively turning the object into stone and preserving it. Here's a detailed explanation of why that is:

• Carbonization: This process involves the conversion of organic material into a carbon-rich residue over time, often under high pressure and heat. It mainly results in a thin film of carbon and is typically associated with the preservation of leaves or shallow fossils.
• Chemical fossilization: Although a broad term, this often refers to various chemical processes that lead to fossil formation. However, it is not a specific term for the mineral replacement process described in the question.
• Petrifaction: This is the correct answer. Also known as permineralization, petrifaction involves mineral-rich water flowing through the organic material's pores. Over time, minerals are deposited, gradually replacing the organic material or filling its spaces, effectively preserving the structure in a solid state. Common examples include petrified wood and bones.
• Microfossilization: This term generally refers to the preservation of microscopic organisms as fossils. It does not specifically describe the process involving mineral-rich water.

Therefore, the correct answer is Petrifaction, as it precisely describes the process of mineral-rich water penetrating through and preserving the decomposed organic matter.