| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,807,516,874 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
Cambrian |
Also found in: Wikipedia | 0.04 sec. |
|
Cambrian of, denoting, or formed in the first 65 million years of the Palaeozoic era, during which marine invertebrates, esp trilobites, flourished Cambrian [′kam·brē·ən] (geology) The lowest geologic system that contains abundant fossils of animals, and the first (earliest) geologic period of the Paleozoic era from 570 to 500 million years ago. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | ||
|---|---|---|---|
| The refinement of what is known about the evolutionary process continues with the work of Parker, who began his direction of thinking with the discovery by scientists that there was an explosion of life at the beginning of the Cambrian era. For years, geologists have struggled with why life flourished so dramatically during the Cambrian era. Subsequent fossil discoveries revealed that an explosion of diverse life forms during the Cambrian era, some 600 million years ago, simultaneously brought into existence every basic body plan that has ever existed. |
| Encyclopedia |
| Free Tools: |
For surfers:
Free toolbar & extensions |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|