Synonymer & Anagram | Engelska ordet HADEAN

Exempel på hur man kan använda HADEAN i en mening

• Aeon can also refer to the four aeons on the geologic time scale that make up the Earth's history, the Hadean, Archean, Proterozoic, and the current aeon, Phanerozoic.
• The Precambrian is an informal unit of geologic time, subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale.
• 5 billion years ago in the early Hadean eon (about 20 to 100 million years after the Solar System coalesced), and the ejecta of the impact event later accreted to form the Moon.
• The Hadean eon was succeeded by the Archean eon, with the Late Heavy Bombardment hypothesized to have occurred at the Hadean-Archean boundary.
• Since little or no geological evidence on Earth exists from the time spanned by the pre-Nectarian period of the Moon, the pre-Nectarian has been used as a guide by at least one notable scientific work to subdivide the unofficial terrestrial Hadean eon.
• It spans 431 million years, from the end of the Hadean Eon 4031 Mya to the start of the Paleoarchean Era 3600 Mya.
• Relict Hadean zircons (xenocrysts) in the Iwokrama Formation suggest that older crust must occur at depth.
• Detrital zircons with ages greater than 4 billion years old have been found in these rocks, and a 4,404 ± 8 million year old zircon was found at Erawandoo Hill; this is the oldest dated material originating on Earth; the date is in the Cryptic era of the Hadean eon.
• Many of the rocks that had originally been thought to be of Azoic time were reclassified as Archaean, but the period itself is now essentially the Hadean.
• Not only is it a noble gas (and therefore is not removed from the atmosphere through chemical reactions with other elements), but comparisons between the abundances of its nine stable isotopes in the modern atmosphere reveal that the Earth lost at least one ocean of water early in its history, between the Hadean and Archean eons.
• In particular, it is sometimes found that the Hadean eon is subdivided into the Cryptic era and Basin Groups 1-9 (which collectively make up the Pre-Nectarian), and the Nectarian and Lower Imbrian.
• Zircons from this granite protolith shows similarities to zircons from the Yilgarn Craton in Western Australia, and may be evidence for continental crust forming in the Hadean Eon.
• It is possible that such early Hadean TTGs were a source of phosphorus for the first oceans and therefore contributed nutrients to the first abiogenic steps of life on Earth.
• When regarding geological history of Earth, the paleoatmosphere can be chronologically divided into the Hadean first atmosphere, which resembled the compositions of the solar nebula; the Archean second atmosphere (also known as the prebiotic atmosphere), which became nitrogen-abundant due to volcanic outgassing and meteoric injections during the Late Heavy Bombardment; and the Proterozoic and Phanerozoic third atmosphere, which started to contain free oxygen.
• 4,533 Ma – Hadean Eon, Precambrian Supereon and unofficial Cryptic era start as the Earth–Moon system forms, possibly as a result of a glancing collision between proto-Earth and the hypothetical protoplanet Theia (the Earth was considerably smaller than now, before this impact).
• The Noachian Period is roughly equivalent to the Earth's Hadean and early Archean eons when Earth's first life forms likely arose.
• Potentially, titanium-in-zircon thermometry of Earth's oldest zircons can show the progressive heat loss from a magmatic Hadean Earth to the onset of plate tectonics as the planet's crust began to cool and underwent plastic deformation.
• io, Carbonated, Futurewei, GAMEPOCH, Genvid Technologies, Hadean, Huawei, HERE Technologies, Intel, International Game Developers Association, Kythera AI, Niantic, Open Robotics, PopcornFX, Red Hat, Rochester Institute of Technology, SideFX, Tafi, TLM Partners, and Wargaming.
• Valley JW, Reinhard DA, Cavosie AJ, Ushikubo T, Lawrence DF, Larson DJ, Kelly TF, Snoeyenbos D, Strickland A (2015) Nano- and Micro-geochronology in Hadean and Archean Zircons by Atom-Probe Tomography and SIMS: New Tools for Old Minerals.

Förberedelsen av sidan tog: 174,78 ms.