The proper name Cambrian is also given to all the rocks that formed during that time (i.e., Cambrian System). 2. Definition. The first part of the Paleozoic era: 590 to 505 million years ago. Cambrian definition is - welsh. The Cambrian Period. SINCE 1828. The Cambrian Explosion, however, was a rapid evolution period starting 542 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.
GAMES; BROWSE THESAURUS; WORD OF THE DAY; WORDS AT PLAY. Trilobites and Brachiopods flourished and most invertebrate phyla had evolved. Cambrian definition, noting or pertaining to a period of the Paleozoic Era, occurring from 570 million to 500 million years ago, when algae and marine invertebrates were the predominant form of life. 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. Learn more. Cambrian explosion, the unparalleled emergence of organisms between 541 million and approximately 530 million years ago at the beginning of the Cambrian Period.The event was characterized by the appearance of many of the major phyla (between 20 and 35) that make up modern animal life. The opening of the Cambrian period is marked by a number of biological changes, including the extinction of the Ediacara biota, the preponderance of armoured organisms (e.g. What does cambrian period mean? Cambrian Explosion synonyms, Cambrian Explosion pronunciation, Cambrian Explosion translation, English dictionary definition of Cambrian Explosion. The geographic reconstruction is based on integrated geologic and biological evidence. Information and translations of cambrian period in the most comprehensive dictionary definitions resource on the web. the small shelly fossils), and a "widening of the behavioural repertoire" indicated primarily by an increase in vertical burrowing, first for protection and later for feeding - the Cambrian substrate revolution. Precambrian definition, noting or pertaining to the earliest era of earth history, ending 570 million years ago, during which the earth's crust formed and life first appeared in the seas. 1. For most of Earth's history, evolution has been a slow progression. Definition of cambrian period in the Definitions.net dictionary. The Cambrian period marked the worldwide spread of the earliest plankton, as well as trilobites, worms, tiny mollusks, and small, shelled protozoans. Meaning of cambrian period. Learn more. Cambrian definition: 1. of Cambria; Welsh 2. designating or of the first geologic period of the Paleozoic Era, characterized by the development of warm, shallow seas and the first hard-shelled marine animals, esp. Fossils in continental-shelf deposits indicate the presence of at least three major faunal provinces (or biogeographical regions) during much of the Cambrian Period. Cambrian period [1] Cambrian is the name given to a period of time in Earth [2]'s history (i.e., Cambrian Period), which spanned 570–510 million years ago.
Noun 1. the Cambrian definition: 1. the Cambrian period (= the period between about 543 and 490 million years ago): 2. from or…. Cambrian period a geological period which began about 515 million years ago and ended 445 million years ago. At this time the British Isles lay in the southern hemisphere and the Sahara was at the South Pole and subject to extensive glaciation. This event is sometimes called the "Cambrian Explosion," because of the relatively short time over which this diversity of forms appears. See more.
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