General Science Module 7 Fossil Record

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Fossil Record #1

Fossils are usually found in sedimentary rock. Since sedimentary rock is laid down by water, it follows that most fossils were laid down by water

Fossil Record #2

The vast majority of the fossil record is made up of hard-shelled creatures like clams. Most of the remaining fossils are of either water-dwelling creatures or insects. Only a tiny, tiny fraction of the fossils we find are of plants, reptiles, birds, and mammals.

Fossil Record #3

Many of the fossils we find are of organisms that are still alive today. Many of the fossils we find are of organisms that are now extinct.

Fossil Record #4

The fossils found in one layer of stratified rock can be considerable different from the fossils found in another later of stratified rock.

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