The Cambrian (/ ˈ k æ m b r i. ə n, ˈ k eɪ m-/ 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 …

2025年1月11日 · Cambrian Period, earliest time division of the Paleozoic Era and Phanerozoic Eon, lasting from 538.8 million to 485.4 million years ago. The Cambrian System, named by …

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. This event is sometimes …

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 …

2016年5月27日 · The Cambrian Explosion was a dramatic burst of evolutionary changes in life on Earth. During the Cambrian Period, which began about 540 million years, trilobites were the …

2012年10月28日 · The Cambrian* Period begins the Phanerozoic Eon, the last 542 million years during which fossils with hard parts have existed. It is the first division of the Paleozoic Era …

The Cambrian is the first geological period of the Palaeozoic era and the Phanerozoic eon. It lasted from 541 million years ago to 485.4 million years ago. [1] Before it came the Ediacaran, …

2025年1月11日 · Cambrian Period - Fossils, Rocks, Animals: Cambrian rocks have a special biological significance, because they are the earliest to contain diverse fossils of animals. …

Cambrian Period, Oldest time division of the Paleozoic Era. During the Cambrian, 541–485.4 million years ago, there were widespread seas and several scattered landmasses. The largest …

2025年1月22日 · 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 …