Ads
related to: cambrian online- Gifts & Collectibles
Deals on Alumni Gear, Home Décor
Drinkware, & Auto Accessories.
- Apparel & Accessories
Shop Our Great Selection of
Team Apparel and Accessories
- Sale & Clearance
Shop Sale & Clearance Selection.
Get In On Deals While They Last!
- Textbooks
Get Your Required Textbooks
& Course Materials Today.
- Gifts & Collectibles
Search results
Results from the Health.Zone Content Network
The Cambrian ( / ˈkæmbri.ən, ˈkeɪm -/ KAM-bree-ən, KAYM-; sometimes symbolized Ꞓ) is the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. [5] The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran period 538.8 million years ago (mya) to the beginning of the Ordovician period 485.4 mya. [6]
The Cambrian explosion (also known as Cambrian radiation [1] or Cambrian diversification) is an interval of time approximately 538.8 million years ago in the Cambrian period of the early Paleozoic when there was a sudden radiation of complex life, and practically all major animal phyla started appearing in the fossil record.
The Cambrian Line ( Welsh: Llinell y Cambrian ), sometimes split into the Cambrian Main Line ( Welsh: Prif Linell y Cambrian) and Cambrian Coast Line ( Welsh: Llinell Arfordir y Cambrian) for its branches, is a railway line that runs from Shrewsbury, England, westwards to Aberystwyth and Pwllheli in Wales.
The Stratigraphy of the Cambrian period currently has several schemes used for ordering geologic formations from the period. The International Commission on Stratigraphy −ICS scheme has set a stratotype section for the base of the Cambrian, dated quite accurately to 538.8 ± 0.2 million years ago. Russian and Chinese scientists have developed ...
Proterozoic: this eon refers to the time from the lower Cambrian boundary, 538.8 Ma, back through 2500 Ma. As originally used, it was a synonym for "Precambrian" and hence included everything prior to the Cambrian boundary. [citation needed] The Proterozoic Eon is divided into three eras: the Neoproterozoic, Mesoproterozoic and Paleoproterozoic.
The Cambrian chordates are an extinct group of animals belonging to the phylum Chordata that lived during the Cambrian, between 538 and 485 million years ago. The first Cambrian chordate known is Pikaia gracilens, a lancelet -like animal from the Burgess Shale in British Columbia, Canada. The discoverer, Charles Doolittle Walcott, described it ...
Cambria. Cambria is a name for Wales, being the Latinised form of the Welsh name for the country, Cymru. [1] The term was not in use during the Roman (when Wales had not come into existence as a distinct entity) or the early medieval period. After the Anglo-Saxon settlement of much of Britain, a territorial distinction developed between the new ...
Cambrian Stage 3 is the still unnamed third stage of the Cambrian. It succeeds Cambrian Stage 2 and precedes Cambrian Stage 4, although neither its base nor top have been formally defined. The plan is for its lower boundary to correspond approximately to the first appearance of trilobites, about 521 million years ago, [2] though the globally ...
Ads
related to: cambrian online