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iridium
iridium anomaly
iridium anomaly The occurrence of unusually high concentrations of the relatively scarce metal iridium at the boundaries of certain geological strata. Two such layers have been discovered, one at the end of the Cretaceous, 65 million years ago, and the second at the end of the Eocene, 34 million years ago. One theory to account for these suggests that on each occasion a huge iridium-containing meteorite may have collided with the earth, producing a cloud of dust that settled out to form an iridium-rich layer. The environmental consequences of such an impact, notably in causing a general warming of the earth by the
greenhouse effect, may have led to the extinction of the dinosaurs at the end of the Cretaceous and the extinction of many radiolarians at the end of the Eocene. See
Alvarez event.
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'Iridium(R) NEXT' to be Unveiled at SATELLITE 2007.
PR Newswire; 2/15/2007; 700+ words
; Iridium Identifying Design and Development Partners For Next...Constellation BETHESDA, Md., Feb. 15 /PRNewswire/ -- Iridium Satellite announces it will formally launch its "Iridium NEXT" initiative at the SATELLITE 2007 Show in Washington...
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Iridium North America Announces Critical Systems are Y2k Ready.
Business Wire; 7/21/1999; 700+ words
; ...for mission-critical operations, Iridium North America is pleased to announce that crucial components of the Iridium satellite communications system under...where Y2K readiness is questionable, Iridium North America offers a system that will...
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Iridium in Regulatory Compliance Process to Enter Russian Market.
PR Newswire; 5/11/2009; 700+ words
; Iridium To Exhibit At Sviaz-Expocomm And Host...and MOSCOW, May 11 /PRNewswire/ -- Iridium Satellite LLC, the world's only mobile...announces it has formed a company called, "Iridium Communications Russia, OOO" to pursue...
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IRIDIUM IN REGULATORY PROCESS TO ENTER RUSSIAN MARKET.(Industry overview)
Newspaper article from: Modem User News; 6/1/2009; 700+ words
; Iridium Satellite LLC, the world's only mobile...coverage, has formed a company called, "Iridium Communications Russia, OOO" to pursue...eventually serving the Russian MSS market, Iridium exhibited and hosted a roundtable seminar...
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IRIDIUM ENHANCES GLOBAL PERSONAL COMMUNICATIONS SYSTEM AND SERVICE; NEW 'DUAL MODE' IRIDIUM PHONE TO COMPLEMENT EXISTING CELLULAR SYSTEMS
PR Newswire; 1/16/1992; 700+ words
; IRIDIUM ENHANCES GLOBAL PERSONAL COMMUNICATIONS SYSTEM AND SERVICE; NEW 'DUAL MODE' IRIDIUM PHONE TO COMPLEMENT EXISTING CELLULAR SYSTEMS LONDON, Jan. 16 /PRNewswire/ -- Iridium, Inc., the Motorola affiliate, today announced...
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Iridium in Regulatory Compliance Process to Enter Russian Market.(Industry overview)
PR Newswire Europe; 5/11/2009; 700+ words
; ...and MOSCOW, May 11 /PRNewswire/ -- - Iridium To Exhibit At Sviaz-Expocomm And Host...With Russian Ministry Of Communications Iridium Satellite LLC, the world's only mobile...announces it has formed a company called, "Iridium Communications Russia, OOO" to pursue...
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Iridium Eyes Recovery With Chapter 11 Bankruptcy Court Protection.
Newspaper article from: Satellite News; 8/16/1999; 700+ words
; Iridium LLC [IRID] officials envision the company...Bankruptcy Court in Delaware was spurred after Iridium defaulted on $1.5 billion in two bank...to high-yield bondholders Aug. 15. Iridium's major shareholders- banks, bondholders...
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Iridium Announces Extension of Popular 'Trade-Up to Iridium' Program.
PR Newswire; 2/19/2009; 700+ words
; ...Provides Credits Up to $700 For Customers Switching to Iridium BETHESDA, Md., Feb. 19 /PRNewswire/ -- Iridium Satellite LLC announces that it is re-launching its popular "Trade-Up to Iridium" program, which provides pricing incentives for...
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Iridium to rise from ashes in new form.(Business)
Newspaper article from: The Washington Times; 3/28/2001; ; 700+ words
; ...ago when he started cobbling together Iridium Satellite LLC with parts salvaged from...network of satellites. On Friday, the new Iridium Satellite LLC will activate its 66 satellites...Illinois company that owned 19 percent of Iridium LLC and controlled the devices, to support...
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Iridium Reports Progress on Iridium NEXT Hosted Payloads Initiative.
News Wire article from: Investrend; 11/20/2009; 700+ words
; ...www.financialwire.net/2009/11/20/iridium-reports-progress-on-iridium-next-hosted-payloads-initiative/) November 20, 2009 (FinancialWire) -- Iridium Communications Inc. (NASDAQ: IRDM) has completed...
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Iridium (revised)
Book article from: Chemical Elements: From Carbon to Krypton
IRIDIUM (REVISED) Note: This article, originally...with most other substances. In fact, iridium is the most corrosion-resistant metal...objects that are exposed to such materials. Iridium may be a key element in the puzzle of dinosaur...
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Iridium
Book article from: Chemistry: Foundations and Applications
Iridium melting point: 2,454°Cboiling...xB0;C)most common ions: Ir3+ Iridium was discovered by English chemist Smithson...element (0.0001 ppm of Earth's crust), iridium is found in the naturally occurring alloys...
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iridium
Book article from: The Columbia Encyclopedia, Sixth Edition
iridium , metallic chemical element; symbol Ir...at 20°C; valence +3 or +4. Iridium is a very hard, usually brittle, extremely...table . It is not certain whether osmium or iridium is the most dense element. Iridium is...
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iridium anomaly
Book article from: A Dictionary of Biology
iridium anomaly The occurrence of unusually high concentrations of the relatively scarce metal iridium at the boundaries of certain geological...these suggests that on each occasion a huge iridium-containing meteorite may have collided...
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Periodic Table of the Elements: Iridium
Book article from: The Columbia Encyclopedia, Sixth Edition
Periodic Table of the Elements: Iridium Periodic Table of the Elements: Iridium Atomic Number: 77 Atomic Symbol: Ir Iridium Atomic Weight: 192.22 Electron Configuration: 2 · 8 ·&thinsp...
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