හේඩියානු
Hadean Artist's impression of a Hadean landscape.
Proposed subdivisions See text Synonym(s) Priscoan Period
Harland et al., 1989 Celestial body Earth Regional usage Global (ICS) Chronological unit Eon Stratigraphic unit Eonothem First proposed by Preston Cloud, 1972 Time span formality Informal Lower boundary definition Formation of the Earth Lower boundary GSSP N/A GSSP ratified N/A Upper boundary definition Defined Chronometrically Upper boundary GSSP N/A GSSP ratified N/A
හේඩියානු යුගය (ඉංග්රීසි: Hadean) යනු වසර බිලියන 4.6 කට පමණ පෙර පෘථිවිය සෑදීමෙන් ආරම්භ වූ භූ විද්යාත්මක කාලයේ පළමු යුගය වේ.
භාහිර සබැඳි
හේඩියානු හා සබැඳි මාධ්ය විකිමාධ්ය කොමන්ස් හි ඇත.
Cryptic
Basin Groups
Nectarian
Lower Imbrian
The Hadean does not have any subdivisions recognized by the International Commission on Stratigraphy. These subdivisions represent one proposal that is loosely based on the lunar geologic timescale.
මහ පොළොවේ භූවේදාත්මක ඉතිහාසය
Cenozoic Era(present–66.0 Ma)
Quaternary (present–2.58 Ma)
Holocene (present–11.8 ka)
Pleistocene (11.8 ka–2.58 Ma)
Neogene (2.58–23.0 Ma)
Pliocene (2.59–5.33 Ma)
Miocene (5.33–23.0 Ma)
Paleogene (23.0–66.0 Ma)
Oligocene (23.0–33.9 Ma)
Eocene (33.9–56.0 Ma)
Paleocene (56.0–66.0 Ma)
Mesozoic Era(66.0–252 Ma)
Paleozoic Era(252–539 Ma)
Proterozoic Eon(539 Ma–2.5 Ga)
Neoproterozoic (539 Ma–1 Ga)
Ediacaran (539–635 Ma)
Cryogenian (635–720 Ma)
Tonian (720 Ma–1 Ga)
Mesoproterozoic (1–1.6 Ga)
Stenian (1–1.2 Ga)
Ectasian (1.2–1.4 Ga)
Calymmian (1.4–1.6 Ga)
Paleoproterozoic (1.6–2.5 Ga)
Statherian (1.6–1.8 Ga)
Orosirian (1.8–2.05 Ga)
Rhyacian (2.05–2.3 Ga)
Siderian (2.3–2.5 Ga)
Archean Eon (2.5–4 Ga)
Neoarchean (2.5–2.8 Ga)
Mesoarchean (2.8–3.2 Ga)
Paleoarchean (3.2–3.6 Ga)
Eoarchean (3.6–4 Ga)
Hadean Eon (4–4.6 Ga)
ka = kiloannum (thousands years ago);
Ma = megaannum (millions years ago);
Ga = gigaannum (billions years ago).
See also: Geologic time scale •
Geology ද්වාරය •
World ද්වාරය
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