Cambrian - Wikipedia
Currently the boundaries of the Cambrian System, three series and six stages are defined by global stratotype sections and points. [1] The lower boundary of the Cambrian was originally …
Cambrian Period | Definition, Plants, & Animals | Britannica
Cambrian Period, earliest time division of the Paleozoic Era, extending from 538.8 million to 485.4 million years ago.
The Cambrian Period
The Cambrian world was bracketed between two ice ages, one during the late Proterozoic and the other during the Ordovician. During these ice ages, the decrease in global temperature led to …
Cambrian Period—541 to 485.4 MYA - U.S. National Park Service
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 …
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 - Wikiwand
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...
Cambrian - New World Encyclopedia
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 …