Cambrian Period යනු Paleozoic යුගයේ පළමු කාලපරිච්ඡේදය, එනම් වසර මිලියන 539-485 කට පෙර යුගය වේ.

Cambrian
538.8 ± 0.2 – 485.4 ± 1.9 Ma
ক্যাম্ব্রিয়ান৫০.png
Earth in the middle of the Cambrian Period
Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitPeriod
Stratigraphic unitSystem
First proposed byAdam Sedgwick, 1835
Time span formalityFormal
Lower boundary definitionAppearance of the Ichnofossil Treptichnus pedum
Lower boundary GSSPFortune Head section, Newfoundland, Canada
47°04′34″N 55°49′52″W / 47.0762°N 55.8310°W / 47.0762; -55.8310
GSSP ratified1992[1]
Upper boundary definitionFAD of the Conodont Iapetognathus fluctivagus.
Upper boundary GSSPGreenpoint section, Green Point, Newfoundland, Canada
49°40′58″N 57°57′55″W / 49.6829°N 57.9653°W / 49.6829; -57.9653
GSSP ratified2000[2]
Atmospheric and climatic data
Sea level above present dayRising steadily from 4 m to 90 m[3]

ගැලරියසංස්කරණය

ආශ්‍රිතසංස්කරණය

සැකිල්ල:CEXNAV

සැකිල්ල:Cambrian preservational modes

මූලාශ්‍රසංස්කරණය

  1. Brasier, Martin; Cowie, John; Taylor, Michael. "Decision on the Precambrian-Cambrian boundary stratotype" (PDF). Episodes. 17. සම්ප්‍රවේශය 6 December 2020.
  2. Cooper, Roger; Nowlan, Godfrey; Williams, S. H. (March 2001). "Global Stratotype Section and Point for base of the Ordovician System" (PDF). Episodes. 24 (1): 19–28. doi:10.18814/epiiugs/2001/v24i1/005. සම්ප්‍රවේශය 6 December 2020.
  3. Haq, B. U.; Schutter, SR (2008). "A Chronology of Paleozoic Sea-Level Changes". Science. 322 (5898): 64–8. Bibcode:2008Sci...322...64H. doi:10.1126/science.1161648. PMID 18832639. S2CID 206514545.

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