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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]
MBMG - Geology of Montana More than 1,400 maps and reports document nearly every aspect of the geologic sciences Although most are authored by MBMG researchers, our collaboration with colleagues in the Montana University System, the private sector, and State Federal agencies has served Montana well
The Cambrian Period - University of California Museum of Paleontology 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—541 to 485. 4 MYA - U. S. National Park Service In 1835 both Sedgwick and Murchison named the rocks they studied for ancient Welsh tribes: Sedgwick used “Cambrian” and Murchison used “Silurian ” Each worker attempted to recognize breaks in the stratigraphic record as boundaries for his subdivision
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 Period - Geology Page The Cambrian is the first geological period of the Paleozoic Era, lasting from 541 0 ± 1 0 to 485 4 ± 1 9 million years ago (mya) and is succeeded by the Ordovician Its subdivisions, and indeed its base, are somewhat in flux