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Costilla Peak   contributed by AMNH   MetBul Link


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[type}

TKW 35.5 kg. Fall not observed. Found 1881, New Mexico, USA.

   
  Iron, IIIAB

AMNH writes:
In the American Museum of Natural History in New York City.

From Buchwald:
A mass of 35.5 kg was found in 1881 by a sheepherder named Ignacio Martin, who believed it was silver ore and, therefore, withheld exact information as to the finding place. The locality was, however, somewhere on the slopes of Costilla Peak in Taos County near the New Mexico-Colorado state line. The meteorite was hidden for some time in a manure pile, until engineer van Diest got hold of it and transferred it to the Colorado Scientific Society...


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NWA 11273
Stefano Prosperi

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MexicoDoug
 8/2/2019 5:09:35 PM
That sign says Bella Roca is the "separated at birth" meteorite from this Costilla Peak which Buchwald did not mention. The location of the find is not documented at all and could easily have been transported. The bulk nickel between Bella Roca and Costilla Peak according to Buchwald is different, though the ratios or ranges may place both in the similar IIIABs classification. I don't think the display at AMNH was discussing pairing unless you want to say all IIIAB medium octahedrites are paired across the globe, so I think that display could be improved for educational purposes. And separated at birth - that would be over 4 billion years ago ;-)
John Divelbiss
 8/2/2019 2:56:42 PM
I'll bet it had the much desired meteorite "organic" smell to it too. :/
Bernd Pauli
 8/2/2019 12:28:06 PM
Yes, Anne, very nice iron, and, as Buchwald also states: "very similar to ... Henbury ...". Buchwald also writes that some of its troilites show multiple twinning and brecciation.
Anne Black
 8/2/2019 11:08:33 AM
Very nice iron with a funny story. Welcome back!!!
 

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