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 …

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Oct 18, 2025 · Cambrian Period, earliest time division of the Paleozoic Era, extending from 538.8 million to 485.4 million years ago.

The Cambrian Period marks an important point in the history of life on Earth; it is the time when most of the major groups of animals first appear in the fossil record.

Jan 22, 2025 · The Cambrian Period marks an important point in the history of life on Earth; it is the time when many kinds of invertebrates and the first vertebrates—fishes—appeared in the fossil record.

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...

Jul 31, 2025 · The Cambrian Period began approximately 541 million years ago and lasted about 55 million years. But the “explosion”—that rapid burst of evolutionary innovation—occurred mostly within …

The Cambrian is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding...

The Cambrian period is divided into three epochs: The Early Cambrian (also Lower Cambrian, Caerfai, or Waucoban), the Middle Cambrian (St Davids or Albertian), and the Late Cambrian or Furongian …

Oct 18, 2025 · Cambrian rocks have a special biological significance, because they are the earliest to contain diverse fossils of animals. These rocks also include the first appearances of most animal …