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en.wikipedia.org/wiki/Iridium

Iridium is a chemical element with symbol Ir and atomic number 77. A very hard, brittle, ... Iridium is found in meteorites in much higher abundance than in the Earth's crust. For this reason, the unusually high abundance of iridium in the clay  ...

www.britannica.com/science/iridium

Dec 21, 2016 ... iridium (Ir): chemical element, one of the platinum metals of Groups 8–10 ... its abundance in the Earth's crust is very low, about 0.001 parts per million. ... Iridium -containing ores are found in South Africa and Alaska, U.S., ...

www.livescience.com/39143-iridium.html

Dec 1, 2016 ... Pure iridium is so rare on the Earth's crust that there is only about 2 parts per billion located in the crust, according to Chemistry Explained.

www.newworldencyclopedia.org/entry/Iridium

Apr 22, 2014 ... Iridium (chemical symbol Ir, atomic number 77) is a dense, hard, brittle, silvery- white ... Iridium is rare in the Earth's crust, but it is found at higher ...

www.chemicool.com/elements/iridium.html

Abnormally high amounts of iridium have been found in rocks dating to the K-T ... a widely held view that an iridium-containing comet struck the Earth at that time, ...

education.jlab.org/itselemental/ele077.html

Since meteors and asteroids contain a higher percentage of iridium than the earth's crust, this iridium enriched layer is seen as evidence that the earth was ...

www.chemistryexplained.com/elements/C-K/Iridium.html

Iridium may be a key element in the puzzle of dinosaur extinction. ... In some parts of the Earth, they have found a layer of the Earth's crust that contains an ...

periodictable.com/Elements/077

The K-T boundary clay is is found in thin layers all over the world at ... It's as if something dumped a huge quantity of iridium on the earth and spread it around in ...

www.encyclopedia.com/science-and-technology/chemistry/compounds-and-elements/iridium

Scientists have now found an answer. In some parts of the Earth, they have found a layer of the Earth's crust that contains an unusually high level of iridium metal ...

.ask.com/youtube?q=Where+Is+Iridium+Found+on+Earth&v=lGy1vGnYAak
Dec 10, 2016 ... So today I will tell you about the most rare metal on Earth - iridium. ... In much higher concentrations iridium is found in meteorites and also in ...