Fossil Formation Steps

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1. Mud and sand fall to the sea bed and as layers build up...
heat and pressure convert the sediment to rocks
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2. Dead animals sink to the sea floor and the soft parts decompose or...
are eaten away, leaving only a skeleton
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3. The skeleton is buried by sediiment and is...
gradually mineralised so it turns to stone
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4. Over millions of years, more fossils are fromed and the...
upper layers of rock contain more recent fossils
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5. As the sea retreats, or the rock layers are pushed up, the rock...
becomes exposed to the elements
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6. Erosion by wind, rain, earthquakes and huan activity gradually...
erode the rock layers, exposing the fossils
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Other cards in this set

Card 2

Front

are eaten away, leaving only a skeleton

Back

2. Dead animals sink to the sea floor and the soft parts decompose or...

Card 3

Front

gradually mineralised so it turns to stone

Back

Preview of the back of card 3

Card 4

Front

upper layers of rock contain more recent fossils

Back

Preview of the back of card 4

Card 5

Front

becomes exposed to the elements

Back

Preview of the back of card 5
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