Book Creator

Fossils

by Alice Temposky

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fossils
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Diplodocus Skeleton
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F O S S I L S


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Fossils
What are they?
fish bone
Fossils are the remains of organisms or species that used to exist
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They're not the actual remains, however, they are formed in sedimentary rocks (pre-existing rock) and the organism leaves an imprint (outline) !
fossil
Here are some organisms that were fossilized
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Arrow
animal
shell

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plant
Types of fossils
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Mold fossil / Fossil cast

Original remains

Petrified fossils / Mineral Replacement

Carbon Films

Trace Fossils
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What does it mean?!
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Lets find out!
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Mold fossils
Mold fossils are when an organism has finally been buried underground and has decomposed or dissolves and creates a space that is left in the rock ----> A MOLD!
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This is the opposite of a mold fossil because the cast gives the observer a three-dimensional impression of the organism's remains. The cast is found when sediment fills up an underground fossil's mold and it takes the shape of the organism!
Fossil cast

Original remains
Original remains is when something is preserved (saved) .
Star;
Insects in AMBER
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Woolly mammoth is frozen
Petrified Fossils
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Petrified fossils which can also be called Mineral replacement is when the remains of an organism is turned into minerals, rocks or stone. This may consist of bones, teeth, or shells. This is where a space is occupied by air or soft materials and once the organism is diseased those spaces are filled with minerals.
Carbon Film
Carbon film is the outline of an
organism that has been preserved for years by fossils. The process that creates this outline: First sediment pacts it down and squeezes it while it is being heated by the Earth. This process pushes out all the gas and liquid that the organism contained and leaves behind a thin film of carbon on the rock which creates the fossil!
Film
Film
Trace
Fossils
This fossil is the trace of its previous
form and this form can be a day-to-day activity that is fossilized. These prints allow us to know the movement of the organism!
Daily activities such as:
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Running
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Burrowing
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Walking
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