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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

Pure iridium probably does not occur in nature; its abundance in the Earth's ... Iridium-containing ores are found in South Africa and Alaska, U.S., as well as in ...

www.livescience.com/39143-iridium.html

Dec 1, 2016 ... In 1980 scientist Luis Alvarez and his son Water Alvarez found significant amounts of iridium in a certain part of the Earth's crust, spread out all ...

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.newworldencyclopedia.org/entry/Iridium

Apr 22, 2014 ... Iridium is rare in the Earth's crust, but it is found at higher concentrations in some volcanic flows, suggesting that the Earth's core is richer in this ...

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, ...

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 ...

www.ask.com/youtube?q=Where+Is+Iridium+Found+on+Earth&v=lGy1vGnYAak
Dec 10, 2016 ... Chemical Elements: http://www.ebay.com /usr/novaelementscom?_trksid= p2047675.l2559 NOVAELEMENTS: https://www.novaelements.com/ ...

www.rsc.org/periodic-table/element/77/iridium

Element Iridium (Ir), Group 9, Atomic Number 77, d-block, Mass 192.217. Sources , facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images.