Fossil Formation Steps 0.0 / 5 ? BiologyEvolution, extinction and natural selectionGCSEAQA Created by: asho glenoCreated on: 14-04-15 13:45 1. Mud and sand fall to the sea bed and as layers build up... heat and pressure convert the sediment to rocks 1 of 6 2. Dead animals sink to the sea floor and the soft parts decompose or... are eaten away, leaving only a skeleton 2 of 6 3. The skeleton is buried by sediiment and is... gradually mineralised so it turns to stone 3 of 6 4. Over millions of years, more fossils are fromed and the... upper layers of rock contain more recent fossils 4 of 6 5. As the sea retreats, or the rock layers are pushed up, the rock... becomes exposed to the elements 5 of 6 6. Erosion by wind, rain, earthquakes and huan activity gradually... erode the rock layers, exposing the fossils 6 of 6
Comments
No comments have yet been made