Cambrian Period | Definition, Plants, & Animals | Britannica
Jan 11, 2025 · 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 English geologist Adam Sedgwick for slaty rocks in southern Wales and southwestern England, contains the earliest record of abundant and varied life-forms.
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
Nov 13, 2022 · 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—541 to 485.4 MYA - U.S. National Park Service
5 days ago · 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. The Burgess Shale contains the best record of …
Cambrian Period - Natural History Museum
Oct 28, 2012 · 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 (542Ma -251Ma). Marine animals with mineralized skeletons make their first appearance in the shallow seas of the Cambrian, though only "small shelly fossils" (tiny shells ...
Cambrian Period - Fossils, Rocks, Animals | Britannica
Jan 11, 2025 · Cambrian Period - Fossils, Rocks, Animals: 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 phyla that have fossil records.
Cambrian Period - Geology Page
Feb 16, 2014 · 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.
Cambrian Period summary | Britannica
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 continent was Gondwana. The average climate was probably warmer than today, with less variation between regions.
Cambrian Period: Facts & Information - Live Science
May 27, 2016 · 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 dominant species.
The Cambrian Period - University of California Museum of …
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 called the "Cambrian Explosion," because of the relatively short time over which this diversity of …
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