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Cambrian - Wikipedia The Cambrian ( ˈkæmbri ən, ˈkeɪm - KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon [5] The Cambrian lasted 51 95 million years from the end of the preceding Ediacaran period 538 8 Ma (million years ago) to the beginning of the Ordovician Period 486 85 Ma [1]
The Cambrian Period Almost every metazoan phylum with hard parts, and many that lack hard parts, made its first appearance in the Cambrian The only modern phylum with an adequate fossil record to appear after the Cambrian was the phylum Bryozoa, which is not known before the early Ordovician
Cambrian Period - National Geographic Learn more about a time period marked by an intense burst of evolution The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known The Cambrian
Cambrian Period: Facts, Information, and Timeline - A-Z Animals Often referred to as the biological big bang, the Cambrian explosion allowed life on earth to evolve from single-celled organisms to several new kingdoms and phyla Many geologic and climatic events also occurred during this period The Cambrian Period lasted for over 55 million years
Cambrian - Wikiwand Despite the long recognition of its distinction from younger Ordovician rocks and older Precambrian rocks, it was not until 1994 that the Cambrian system period was internationally ratified
Cambrian - New World Encyclopedia Earth's land and sea distribution in the Early Cambrian epoch about 528 million years ago During the Cambrian's 54 million years, sea level rose steadily from 30 to 90 meters (98 to 295 feet) above the current level
What Was the Cambrian Period Climate Like? - Biology Insights Earth’s climate during the Cambrian was shaped by large-scale geological processes, particularly plate tectonics The supercontinent Rodinia began to break apart prior to the Cambrian, leading to increased seafloor spreading and volcanic activity
Cambrian Period | Natural History Museum Marine animals with mineralized skeletons make their first appearance in the shallow seas of the Cambrian, though only "small shelly fossils" (tiny shells, spines and scales from early metazoans) and trace fossils are preserved for the first ten million years or so