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| | Handprint : Geoevolution |
 | | In the late Cambrian, continental blocks comprising about one third of the supercontinent Rodinia, which extended from the South Pole to the equator, broke away and drifted north and west. |
 | | However, Cambrian marine life was quite different from modern life forms; the dominant invertebrates with hard parts were trilobites, inarticulate brachiopods, archaeocyathids, and problematic conical fossils known as hyolithids. |
 | | Many Early Cambrian invertebrates are known only from "small shelly fossils" -- tiny plates and scales and spines and tubes and so on, many of which were pieces of the skeletons of larger animals. |
| www.handprint.com /PS/GEO/geoevo.html (3279 words) |
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