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An MPOD Classic from from 2 August 2016


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Canyon Diablo   contributed by Paul Swartz, IMCA 5204   MetBul Link


Roll Overs:     #1   #2   #3   #4    


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View all entries for   Meteorite (56)   Paul Swartz (237)


Copyright (c) Paul Swartz. All rights reserved.
373 grams.   Iron, IAB-MG

TKW 30 metric tons. Observed fall: no. Impacted about 50,000 years ago. Found 1891 in Coconino County, Arizona, USA, between Flagstaff and Winslow.



 


Paul writes:
This specimen underwent a hot water/aluminum foil/sodium carbonate galvanic cleaning process to minimize any chance of chloride rot from Lawrencite and/or Akaganeite. It seems to have produced a darker then normal color, too.

I learned on page 44 of the latest issue of Astronomy that in 1953 American geochemist Clair Cameron Patterson studied lead isotopes from uranium decay in a Canyon Diablo specimen to deduce the first accurate age estimate of the solar system - 4.55 billion years. A picture of a CD accompanied the article and was attributed to some guy named Robert Haag :)


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#1

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#4

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John Divelbiss
 8/2/2020 6:32:15 PM
Paul...pic #4 looks like a CD without the extra sheen
Paul Swartz
 8/2/2020 5:27:13 PM
Too much blue. I think photo 4 is more accurate.
Anne Black
 8/2/2020 2:42:33 PM
Nice rock, but yes, odd color for a Canyon Diablo.
 

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