Precambrian


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Pre·cam·bri·an

 (prē-kăm′brē-ən, -kām′-)
adj.
Of, relating to, or being the geologic time period between Hadean Time and the Cambrian Period, often subdivided into the Archean and Proterozoic Eras, comprising most of the earth's history and marked by the appearance of primitive forms of life. See Table at geologic time.
n.
The Precambrian Eon.

Precambrian

(priːˈkæmbrɪən) or

Pre-Cambrian

adj
(Geological Science) of, denoting, or formed in the earliest geological era, which lasted for about 4 000 000 000 years before the Cambrian period
n
(Geological Science) the Precambrian the Precambrian era. See Archaeozoic, Proterozoic

Pre•cam•bri•an

or Pre-Cam•bri•an

(priˈkæm bri ən, -ˈkeɪm-)
adj.
1. 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.
n.
2. the Precambrian Era.
[1860–65]

Pre·cam·bri·an

(prē-kăm′brē-ən, prē-kām′brē-ən)
The span of geologic time between Hadean Time and the Phanerozoic Eon, from about 3.8 billion to 540 million years ago. During the Precambrian Eon, which is divided into the Archean and Proterozoic, primitive forms of life first appeared on Earth. See Chart at geologic time.

Precambrian

The period containing all of Earth’s history before the Cambrian period.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Precambrian - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago
Proterozoic, Proterozoic aeon, Proterozoic eon - from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
Archaeozoic, Archaeozoic aeon, Archean, Archean aeon, Archean eon, Archeozoic, Archeozoic eon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Translations
References in periodicals archive ?
The Precambrian basement rocks are exposed in Nagar Parker, the extreme south east comer of Pakistan bordering the Indian Rajasthan, along the Sargodha High in Punjab and the Besham area of Khyber Pakhtunkhwa.
Based on the multi-scale and multi-technique study of morphologically preserved microorganisms fossilized within ancient siliceous nodules, I propose to chronologically reconcile the evolution of metabolisms of life forms during the Precambrian with the variation of (sea)water paleo-temperatures registered by the silica matrix in which the investigated organic microfossils are embedded.
The water was discovered in 2013 on the 400-year old Pant Du farm estate when the the Wyn Huws family (who had purchased the farm in 2003) decided to drill through the surrounding Precambrian rock for water.
East European Craton: Early Precambrian History and 3D Models of Deep Crustal Structure (CD-ROM included)
Geochronology, Dating, and Precambrian Time: The Beginning of the World As We Know It.
Origin and evolution of Precambrian high-grade gneiss terranes, with special emphasis on the Limpopo complex of Southern Africa.
Windley has been a hugely influential "pioneer in the application of uniformitarianism to Precambrian rocks, a leader in linking field geology with the geochemistry and geochronology of different orogenic units with global tectonic history, and an overall polymath who has had a deep influence on many fields of geological science" (from the preface).
It would have landed in the ancient Precambrian sea, which covered the Midlands at the time, producing choking dust clouds and plumes of steam, which settled and formed into rock.
The text examines "Darwin's dilemma," the lost history of the origin of animal life in the Precambrian time.
The finding is significant, because similar fossil grooves and furrows found from the Precambrian era, as early as 1.
14]C/C ratios drawn from the 90 studies summarized by Giem, one for non-biological Precambrian samples and one for biological Phanerozoic samples.
Other durable but pliable organic materials, such as protist resting cysts, are important parts of the Precambrian fossil record, up to 2 billion years old.