There are different kinds of fossils Petrified Molds and casts Carbon film Trace Preserved remains.
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Transcript of There are different kinds of fossils Petrified Molds and casts Carbon film Trace Preserved remains.
![Page 1: There are different kinds of fossils Petrified Molds and casts Carbon film Trace Preserved remains.](https://reader036.fdocuments.us/reader036/viewer/2022062408/56649ee05503460f94bf0012/html5/thumbnails/1.jpg)
There are different kinds of fossils
• Petrified• Molds and casts• Carbon film• Trace• Preserved remains
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Petrified Fossils
• Forms when water that is rich in minerals seeps into spaces in cells and then over time evaporates out.
• When the water evaporates it leaves the minerals behind.
• The minerals turn harden and turn the organism to stone
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Molds and casts
• A mold is a hollow area in sediment where an organism used to be
• A cast is a copy of the shape of the organism
Cast Fossil
Mold fossil
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Mold Cast
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Carbon Film
• The organism leaves an extremely thin coating of carbon on a rock
• Gases escape from the sediment and leave carbon behind
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Trace Fossils
• Provides evidence of animal activity.• Example:– Footprint / Caves– Poop
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Preserved Remains (body fossils)
• Some processes preserve the remains of organisms with little or no change– Tar pits– Amber– Freezing