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Cambrian system - LoveToKnow 1911 (2844 words) |
 | The middle division covers approximately the same region as the lower one, and in addition it is found in Texas, Oklahoma, Indian Territory, Arizona, in western Montana, and possibly in western Wisconsin. |
| The Cambrian system is covered by his stages "B" and "C"; the former a barren series of conglomerates and quartzites, the latter a series of grey and green fissile shales 1200 ft. thick with sandstones, greywackes and conglomerates. |
| The Cambrian system is represented in the Salt Range of India by the Neobolus or Khussack beds, which may possibly belong to the middle subdivision. |
| Palaeos Paleozoic: Cambrian: The Cambrian Period - 1 (2818 words) |
| Laurentia stretched across the Cambrian equator, partly submerged by the Iapetus ocean, with a mostly mostly submerged Baltica and Siberia approaching from the South-East. |
| During the 53 million years that the Cambrian period lasted there was the sudden appearance and diversification of almost every major group (phylum) of animal life, as well as many types that later died out. |
| The most characteristic animals of the Cambrian period were the trilobites, a primitive form of arthropod remarkable for it's highly developed eyes (unusual in such an early organism). |
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