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Cambrian    音标拼音: [k'æmbriən]
a. 寒武纪的
n. Cambria人,Wales人,寒武纪层

寒武纪的Cambria人,Wales人,寒武纪层

Cambrian
adj 1: of or relating to or characteristic of Wales or its
people or their language; "the Welsh coast"; "Welsh
syntax" [synonym: {Welsh}, {Cambrian}]
n 1: from 544 million to about 500 million years ago; marine
invertebrates [synonym: {Cambrian}, {Cambrian period}]
2: a native or resident of Wales [synonym: {Welshman}, {Welsh},
{Cambrian}, {Cymry}]

Primordial \Pri*mor"di*al\, a. [L. primordialis, from primordium
the first beginning; primus first ordiri to begin a web, to
begin: cf. F. primordial.]
1. First in order; primary; original; of earliest origin; as,
primordial condition. "The primordial facts of our
intelligent nature." --Sir W. Hamilton.
[1913 Webster]

2. (Geol.) Of or pertaining to the lowest beds of the
Silurian age, corresponding to the Acadian and Potsdam
periods in American geology. It is called also {Cambrian},
and by many geologists is separated from the Silurian.
[1913 Webster]

3. (Biol.) Originally or earliest formed in the growth of an
individual or organ; as, a primordial leaf; a primordial
cell.
[1913 Webster]

{Primordial utricle} (Bot.), the interior lining of a young
vegetable cell.
[1913 Webster]


Cambrian \Cam"bri*an\, a.
1. (Geog.) Of or pertaining to Cambria or Wales.
[1913 Webster]

2. (Geol.) Of or pertaining to the lowest subdivision of the
rocks of the Silurian or Molluscan age; -- sometimes
described as inferior to the Silurian. It is named from
its development in Cambria or Wales. See the Diagram under
{Geology}.
[1913 Webster]


Cambrian \Cam"bri*an\, n.
1. A native of Cambria or Wales.
[1913 Webster]

2. (Geol.) The Cambrian formation.
[1913 Webster]


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  • Cambrian - Wikipedia
    The Cambrian ( ˈkæmbri ən, ˈkeɪm - KAM-bree-ən, KAYM-) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon [5] The Cambrian lasted 51 95 million years from the end of the preceding Ediacaran period 538 8 Ma (million years ago) to the beginning of the Ordovician Period 486 85 Ma [1]
  • 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
  • Cambrian Period—541 to 485. 4 MYA - U. S. National Park Service
    In 1835 both Sedgwick and Murchison named the rocks they studied for ancient Welsh tribes: Sedgwick used “Cambrian” and Murchison used “Silurian ” Each worker attempted to recognize breaks in the stratigraphic record as boundaries for his subdivision
  • Cambrian Period: Facts, Information, and Timeline - A-Z Animals
    Often referred to as the biological big bang, the Cambrian explosion allowed life on earth to evolve from single-celled organisms to several new kingdoms and phyla Many geologic and climatic events also occurred during this period The Cambrian Period lasted for over 55 million years
  • Cambrian Period - National Geographic
    The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known The Cambrian Explosion saw an incredible diversity of life emerge, including many major
  • Cambrian Period: Facts Information - Live Science
    Scientists find some of the best specimens for the “evolutionary experiments” of the Cambrian Period in the fossil beds of the Sirius Passet formation in Greenland; Chenjiang, China; and the
  • Cambrian Period - Geology Page
    The Cambrian is the first geological period of the Paleozoic Era, lasting from 541 0 ± 1 0 to 485 4 ± 1 9 million years ago (mya) and is succeeded by the Ordovician Its subdivisions, and indeed its base, are somewhat in flux
  • Cambrian Period - Natural History Museum
    Marine animals with mineralized skeletons make their first appearance in the shallow seas of the Cambrian, though only "small shelly fossils" (tiny shells, spines and scales from early metazoans) and trace fossils are preserved for the first ten million years or so
  • Cambrian Period - Fossils, Rocks, Animals | Britannica
    Cambrian rocks have a special biological significance, because they are the earliest to contain diverse fossils of animals These rocks also include the first appearances of most animal phyla that have fossil records
  • Cambrian - Simple English Wikipedia, the free encyclopedia
    The Cambrian is the first geological period of the Palaeozoic era and the Phanerozoic eon It lasted from 541 million years ago to 485 4 million years ago [1] Before it came the Ediacaran, and after it the Ordovician Biologists have learnt quite a lot about the soft parts of Cambrian animals





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