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Mainly because the fossils of plants and animals preserved in the sediment layers allow dating of events that happened before humans existed.
The climate at the time the fossile was preserved. :)
Carbonaceous film fossils are traces of plants or animals preserved as a thin film of carbon. All living organisms contain carbon. If they are compressed by layers of sediment fine details of the organism may be preserved.
Fossils can be made of any material that deteriorates slower than the sediment that forms the fossil hardens
Fossils can be made of any material that deteriorates slower than the sediment that forms the fossil hardens
fossils
Animals are not preserved as fossils. Fossils are imprints of the organism where the body has been replaced by rock minerals. They are most usually found in sedimentary rocks, occasionally in metamorphic rock but never in igneous rock.
Fossils is the word
When ancient animals and plants died, their bodies might be covered in silt, mud, sand, etc. Over an extremely long time, the sediment may be turned into sedimentary rock. The preserved remains are what we know as fossils.
The preserved remains of animals of evidence of their existence are Fossils Fosssils that provide evidence about the past are called trace fossils.
fossils
I would say fossils .