The complex of data recorded in fossils worldwide—known as the fossil record—is the primary source of information about the history of life on Earth. Trace fossils include footprints, burrows, tracks, borings and feces left behind by animals. Other forms of transportation, railways and aircraft, also required fossil fuels. How fossils form depends on the type of fossil it is. They can also be formed through steadier processes, like exposure to the (extreme) elements.
On a large scale, this is what creates coal beds.

Unlike molds and casts, they are not formed using an impression. Fossil, remnant, impression, or trace of an animal or plant of a past geologic age that has been preserved in Earth’s crust. In the hit movie, Jurassic Park, fictional scientists used fossils to create dinosaurs because fossils are remains of creatures from thousands to millions of years ago. These are all formed of biominerals—meaning that organisms built them while they were alive, usually for strength and protection, and then left them behind when they died. Fossils are the remains or traces of plants and animals that lived long ago. Many fossils are of shells, bones, or teeth that have been turned to stone by a process called petrification.

Fossils give scientists clues about the past. It’s very rare for living things to become fossilised. True form fossils are formed when the animals soft tissues or hard parts did not decay over the years. Common examples of these fossils include limbs, torsos, fingers, and heads.

True-form fossils

They normally form from animals fish and objects such as jewelry.

After the animals or plants died, they were quickly buried (sinking in mud, buried in a sandstorm, etc). A cast fossil is 3 dimensional, while a mold must be present for a cast fossil to occur. footprints), but only one set of hard parts (e.g. A fossil is the preserved remains or traces of a dead organism. A Mold Fossil is a fossilised impression made in the substrate, a negative image of the organism. Fossilisation. David says, 'It can take millions of years, but gradually fossils become exposed at the surface where we can find them. True form fossils are formed by a process called petrification. For this reason, fossils are important to paleontology , or the study of prehistoric life .

There are other types of fossils too.
Fossils are created through sudden disruptions, like earthquakes. Mold fossils form after hard parts have been buried in mud, clay, or other material that turns to stone.

True form fossils are large body parts of an organism that has been replaced by minerals. Over time, layers of sediment covered the remains. How are fossils formed? They can come in a number of shapes and forms, and their appearance can be influenced by the manner in which they were formed.

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