There are two theories about how and when fossils formed.
Evolution theory predicts the following about fossils:-
Let's examine the predictions of the Biblical model.
What do you expect to happen to plants and animals when parts of the crust are turning upside down? Plants, trilobites, shell fish and so on would be more or less helpless, and so would get buried first. Reptiles would be next. Mammals, especially apes are smarter than other animals, and would perhaps rush to the mountains to escape the flood waters. They would get buried on top of the reptiles and lower animals. It is worth noting that the "lower" organisms have higher density (specific gravity) and hence will have a tendency to settle at the bottom. There will be tall trees that would cut across various layers. There would also be certain animals that break the above pattern. For instance, a sick gorilla on the bank of a river would get buried with crabs and snails. Finally, humans would probably try to survive on makeshift rafts. The corpses of those who died on the rafts would end up floating on the water and being eaten by scavenging organisms.
Now let's look at the observations from the fossil record.
"The eyes of early trilobites have never been exceeded for complexity or acuity by later anthropods." - Stephen Jay Gould, "The Ediacaran Experiment", Natural History, February 1984, 22-23.
Well preserved jellyfish fossils have been found! Evolutionary researcher James Hagadorn says: "When people find a T-rex, that doesn't excite me that much because a T-rex has bones and teeth - really easy to fossilize. But to preserve a jellyfish, that's hard, because it has no hard parts. Something is there that we don't understand." [Impressions of Ancient Jellyfish, Geotimes, February 2003]
That "something" is that fossilization does not take place the way evolutionists speculate. Fossils were formed in the sudden burial that accompanied Noah's Flood.
These are modern animals that have remained virtually unchanged in supposedly hundreds of millions of years of evolutionary history. Evolution theory states that random genetic changes in organisms selected by the struggle for survival have forced organisms to change enormously. Frogs have become princes, and goo has become you. But living fossils prove that animals that supposedly lived very long ago had all it takes to survive millions of years of environmental change. This casts serious doubts on whether massive change took place at all. Fish can survive as fish - there is no need for fish to turn to people in order to survive. This suggests that fish have always been fish, and people have always been people. Note that every major category of organisms has its living fossils. Examples include the coelacanth fish (fossil coelacanths are believed by evolutionists to be 340 million years old), Gingko trees (125 million years), crocodiles (140 million years), horseshoe crabs (200 million years), the Lingula lamp shell (450 million years), Neopilina molluscs (500 million years), and the tuatara lizard (200 million years).
The following are the excuses given by evolutionists to explain away living fossils:-
Famous evolutionists Stephen Jay Gould and Niles Eldredge have admitted: "the maintenance of stability within species must be considered as a major evolutionary problem" [Gould, S. and Eldredge, N., Punctuated equilibrium comes of age, Nature 366 (6452):223-224, 1993]
Note that the Biblical model naturally accommodates living fossils. Learn more
These are fossils that occur in a layer that was supposedly deposited long before these organisms evolved. A couple of examples follow.
Precambrian Pollen: Evolutionists believe that pollen producing plants evolved during the late Devonian period or later. However, pollen has been found in Precambrian layers; these layers were supposedly deposited 1.3 billion years before the Devonian period, when there were only bacteria and algae! The original source is Stainforth, R.M. Occurrence of pollen and spores in the Roraima Formation of Venezuela and British Guiana, Nature 210: 292-294, 1966. Stainforth rules out contamination (which is the usual excuse offered by evolutionists to explain away misplaced fossils) because the rocks are dense and impermeable, compressed by an overburden of hundreds of feet. He concludes by saying: "We offer no solution to the paradox ... a highly intriguing geological problem."
Mammals and birds during the "dinosaur era": Evolutionists claim that mammals arrived on the scene about the time dinosaurs went extinct. The same applies for modern birds. But ducks, squirrels, platypus, beaver- and badger like creatures have been found in dinosaur era rock layers. It happens with human nature that you tend to find what you believe in, and vice versa. Because of their evolutionary bias, researchers did not bother about mammals found in dinosaur dig sites. It's only recently that these fossils have got attention.
Marine fossils have been found on mountain tops far away from the sea. Again, this suggests a worldwide flood.
Note that the Biblical Flood Model naturally accommodates these fossils.