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Calymmian

The Calymmian (from Ancient Greek: κάλυμμα, romanized: kálymma, meaning 'cover') is the first geologic period in the Mesoproterozoic Era, lasting from 1600 to 1400 million years ago (Ma) and spanning 200 million years. It follows the Statherian Period from the Paleoproterozoic Era, and precedes the Ectasian Period. Instead of being based on stratigraphy…

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Celestial body
Earth
Chronological unit
Period
Lower boundary definition
Defined chronometrically
Lower GSSA ratified
1990
Name formality
Formal
Regional usage
Global (ICS)

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Calymmian

Nodes19
Edges18
Triples22
Avg. degree1.89
Density0.105263
Components1

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Calymmian

Top relations

related to Further reading · 11
Calymmian → Archived, Calymmian Period, Divisions, GeoWhen Database, International Geologic Time Scale, James, Lethaia, May, Ogg, Retrieved January, Status
Celestial body · 1
Calymmian → Earth
Chronological unit · 1
Calymmian → Period
Lower boundary definition · 1
Calymmian → Defined chronometrically
Lower GSSA ratified · 1
Calymmian → 1990
Name formality · 1
Calymmian → Formal
Regional usage · 1
Calymmian → Global (ICS)
Stratigraphic unit · 1
Calymmian → System
Time scale(s) used · 1
Calymmian → ICS Time Scale
Time span formality · 1
Calymmian → Formal

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Important terminology

period ma 1500 mya 1600 1400 earth years ago columbia era mesoproterozoic statherian ectasian chronometrically supercontinent also proterozoic archean defined

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CalymmianCelestial bodyEarth1.00infobox
CalymmianChronological unitPeriod1.00infobox
CalymmianLower boundary definitionDefined chronometrically1.00infobox
CalymmianLower GSSA ratified19901.00infobox
CalymmianName formalityFormal1.00infobox
CalymmianRegional usageGlobal (ICS)1.00infobox
CalymmianStratigraphic unitSystem1.00infobox
CalymmianTime scale(s) usedICS Time Scale1.00infobox
CalymmianTime span formalityFormal1.00infobox
CalymmianUpper boundary definitionDefined chronometrically1.00infobox
CalymmianUpper GSSA ratified19901.00infobox
Calymmianrelated to Further readingCalymmian Period0.60section

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