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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Are the remains or traces of ancient life which have been preserved by natural causes in the earth's crust. |
Fossils |
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Small organisms or part trapped in amber, hardened plant sap. |
Unaltered preservation |
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The organic contents of bone and wood are replaced with silica, calcite and pyrite forming a rock like fossils |
Permineralization/Petrification |
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Hard parts are dissolved and replaced by other minerals, like calcite, silica pyrite and iron. |
Replacement |
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The other elements are removed and only the carbon remained |
Carbonization/Coalification |
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Hard parts are converted to more stable minerals or small crystals turns into larger crystals. |
Recrystalization |
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Molds and casts are formed after most of the organism have been destroyed or dissolved. |
Authigenic preservation |
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Impression made in substrate -negative image of an organisms |
Mold |
Shells |
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When a mold is filled in |
Casts |
Bones & Teeth |
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Organic material converted into rocks |
Petrified |
Petrified trees, coal balls |
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Preserved wholly,dissicated inside caves in and regions or encased in amber/fossilized resin |
Original remains |
Woolly mammoth, amber from the Baltic sea region |
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Carbon impression in sedimentary rocks |
Carbon film |
Leaf impression on rock |
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Records the movements and behavior of the organism |
Trace/Ichnofossils |
Trackways, toothmarks, gizzard rocks |
