Trace Fossils

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by EarthlyRain
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Social Studies

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CITED SOURCES"Trilobite Trace Fossils." Trilobite Trace Fossils. Web. 10 Sept. 2015. ."What Are Fossils?" What Are Fossils. Web. 10 Sept. 2015. ."Fossil Tracks and Other Trace Fossils Refute Flood Geology." Fossil Tracks and Other Trace Fossils Refute Flood Geology. Web. 10 Sept. 2015. .BBC News. BBC. Web. 10 Sept. 2015. ."Indiana Limestone." Indiana Limestone. Web. 10 Sept. 2015. ."Fossilization (palaeontology)." - Encyclopedia Article. Web. 10 Sept. 2015. ."Fossils - Window to the past." Fossils - Window to the past. Web. 10 Sept. 2015. .

Trace fossils are found in shallow marine sedimentary rocks, and are usually always near bodies of water or wet areas. Many trace fossils are found underwater because they have been exposed to tidal waves and have been brought back into the sea over time.

Fossils are a gateway to the past because in them, you can find history. For example, bones from 7.4 million years ago.

Using these pieces of evidence, scientists can "look into the past" and discover what it was like, what lived there, and how it looked.

What is a Trace Fossil?Trace fossils: typically formed when an organism moves over the surface of soft sediment and leaves an impression of its movement behind.trace fossils = ichnofossils (fossilized nests, gastroliths, burrows, footprints, etc.)

Image description about the enviromental issues

What Conditions Made it Possible for you to be Fossilized?When the synapsids walked across the sediment, it was wet. It hardened before anything could disturb the markings or be buried or filled in by new sediment. That way, it remained undisturbed and preserved.

I am still on Earth today. The tracks were created by synapsids, and they are ancestors of marsupials and monotremes and placentals.

T r a c e F o s s i l s

How Were You Formed?How did it Feel to BecomeFossilized?When my organism stepped onto soft and wet mud, it left me- a footprint. Then, I was filled with loose sand, which eventually became sandstone. The rock split and I was cast in sandstone.

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What can it tell us?Fossil footprints have yielded information about: •Speed and length of stride •whether they walked on two or four legs •the bone structure of the foot •stalking behavior (a carnivore hunting a herd of herbivores) •the existence of dinosaur herds and stampedes •how the tail is carried (few tail tracks have been found, so tails were probably held above the ground)

Trace fossil of Footprints

By studying trace fossils, scientists don't necessarily learn specific details about the organism itself, but they can tell about the organism's behavior. However, a trace fossil can sometimes tell about the organism in question. Scientists will sometimes use the size of a footprint to determine the proportionality of the track to the rest of the body. You can also use a trace fossil to find out where a specific organism used to roam around.

Fun fact: On rare occasions, the remains of lightning strikes have been found as trace fossils - the sand fused into strange shapes by the energy of the lightning bolt.Fun Fact: the study of trace fossils is called ichnology, which is a branch of paleontology

I did not change much during my lifetime, considering that I was made in sandstone (the best rock for ideal preservation of trace fossils). Trace fossils, in general, have evolved from showing the simplest of burrows, to the most complex animal behaviors.


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