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BookmarkThe Cambrian is a major division of the geologic timescale that begins about 542 Ma (million years ago) at the end of the Proterozoic eon and ended about 488.3 Ma with the beginning of the Ordovician period (ICS, 2004).
See also:
It is the first period of the Paleozoic era of the Phanerozoic eon..
For more information about the topic Cambrian, read the full article at Wikipedia.org, or see the following related articles:
Paleozoic — The Paleozoic Era is a major division of the geologic timescale, one of four geologic eras. The Paleozoic includes six geologic periods; from oldest ... > read more
Precambrian — The Precambrian is an informal name for the eons of the geologic timescale that came before the current Phanerozoic eon. It spans from the formation ... > read more
Vertebrate — Vertebrates are members of the subphylum Vertebrata (within the phylum Chordata), specifically, those chordates with backbones or spinal columns. ... > read more
Trace fossil — Trace fossils are those details preserved in rocks that are indirect evidence of life. While we are most familiar with relatively spectacular fossil ... > read moreNote: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Cambrian at Wikipedia.org. See the Wikipedia copyright page for more details.
