ज़िरकॉन्स इसके अंग्रेजी अर्थ का उदाहरण

They are best known as the source of the oldest material of terrestrial origin found to date: Hadean zircons that formed around 4.

These zircons have enabled ground-breaking research into the conditions on earth in the Hadean eon.

Oldest zircons on Earth .

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.

Given the detrital nature of the rock unit, the zircons are sourced from pre-existing rocks which were then weathered and the resultant sediment deposited as sedimentary rock.

The zircons and various aspects of their geochemistry provide evidence for the existence of continental-type crust on the surface of the earth during the Hadean eon, contrasting with earlier ideas on the earliest phase of Earth's history.

Additionally, oxygen isotopic ratios in the zircons provide evidence for the presence of liquid water on the surface, if not a water ocean; also contrasting with earlier ideas on Earth's history.

The metaconglomerates of the Jack Hills of Western Australia are the source rocks for much of the detrital zircons that have been dated to be as old as 4.

Disneyland Hotel#Hong Kong Disneyland Resort Jargoon or jargon (occasionally in old writings jargounce and jacounce) is a name applied by gemologists to those zircons which are fine enough to be cut as gemstones, but are not of the red color which characterizes the hyacinth or jacinth.

The so-called Matura diamonds, formerly sent from Matara (or Matura), in Sri Lanka, were decolorized zircons.

These rocks provide the bulk of age determinations from the Narryer Gneiss Terrane from detrital zircons, with the bulk of readings bracketing 3.

Geochronological analysis of Narryer Gneiss zircons.

Geologist Kevin Henke has criticised Humphreys for stating that "zircons from the Fenton Hill rock cores.

Detrital zircons in the Jumperding Gneiss Complex range in age from 3267 ± 30"nbsp;Ma to 3341 ± 100"nbsp;Ma, with metamorphic overgrowth dated at 3180"nbsp;Ma.