A geologic range table outlines the time periods in which specific fossils existed. For instance, trilobites spanned the Cambrian to Permian. Such tables aid in studying evolutionary and extinction patterns.
A geologic range table for a fossil group typically displays the time intervals during which specific fossils or taxa within that group are known to have existed. It helps geologists and paleontologists understand the temporal distribution of various organisms. Below is a simplified example for illustration:
| Fossil Group | Geologic Range |
|-------------------|----------------------------------|
| Trilobites | Cambrian - Permian |
| Ammonites | Devonian - Cretaceous |
| Dinosaurs | Triassic - Cretaceous |
| Brachiopods | Cambrian - Recent |
| Megafauna Mammals | Pleistocene - Holocene |
| Plant Fossils | Silurian - Recent |
This table demonstrates the geologic range of different fossil groups, indicating the periods during which these organisms or plant species existed. Actual tables would include more detailed stratigraphic information, often specifying stages or substages within geologic periods. It is essential for understanding the evolution and extinction patterns of various life forms throughout Earth's history.