The conversation between human and AI assistant.
How do identify whether it is a fossil or not?
Can you tell me more about the types of fossils?
Sure. There are four main types of fossils: petrified, molds and casts, carbonaceous, and trace fossils. Petrified fossils are formed when minerals replace organic material, molds and casts are formed when an organism is buried in sediment and then dissolved, leaving an imprint, carbonaceous fossils are formed from carbon-rich materials, and trace fossils are imprints from the activity of ancient organisms.