| A | B |
|---|
| buried | put underground; covered |
| creatures | animals or humans |
| extinct | no longer existing |
| fossils | remains or traces of prehistoric plants or animals found in the earth |
| fresh | having its original qualities |
| ichthyosaur | any of an extinct group of porpoise like marine reptiles |
| layers | thickness of materials lying one on another |
| millions | 1,000 times 1,000; a great amount |
| peat | a highly organic material found in marshy or damp regions |
| sandstone | a common sedimentary rock consisting of sand |
