Cambrian
Cambrian
Cambrian (/kæmˈbriːən/ kam-BREE-ən) is a term used in geology to refer to a period in Earth's history approximately 541 to 485.4 million years ago. It is the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian is notable for the rapid diversification of multicellular life, known as the Cambrian explosion.
Etymology
The term "Cambrian" comes from Cambria, the Latin name for Wales, where rocks from this age were first studied.
Related Terms
- Cambrian explosion: A period of rapid evolutionary development during the Cambrian period.
- Paleozoic Era: The era of geologic time during which the Cambrian period occurred.
- Phanerozoic Eon: The current eon in the geologic time scale, and the one during which abundant animal and plant life has existed. It covers 541 million years to the present, and it began with the Cambrian period.
- Geology: The science that deals with the earth's physical structure and substance, its history, and the processes that act on it.
External links
- Medical encyclopedia article on Cambrian
- Wikipedia's article - Cambrian
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