preservation of fossils

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What are exceptional methods of preservation?
Amber and Tar
1 of 8
What replaces the fossil material in silicification?
Silica Dioxide
2 of 8
What causes carbonisation?
compaction
3 of 8
in replacement what does unstable aragonite change to?
Calcite
4 of 8
what conditions are need for pyritisation?
Anaerobic and sulfur bacteria
5 of 8
where is pyritisation common?
deep sea or shallow swamp
6 of 8
what is a common example of pyritisation?
Petrified wood
7 of 8
an external mould has what features of the shell?
External features
8 of 8

Other cards in this set

Card 2

Front

What replaces the fossil material in silicification?

Back

Silica Dioxide

Card 3

Front

What causes carbonisation?

Back

Preview of the front of card 3

Card 4

Front

in replacement what does unstable aragonite change to?

Back

Preview of the front of card 4

Card 5

Front

what conditions are need for pyritisation?

Back

Preview of the front of card 5
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Comments

James Disney

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Petrified wood is an example of Silicification, not pyritisation

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