Gregor Hoeher 3/31/2020 3:19:37 PM |
Very nice, bigger piece. It has the typical appearance of the Carancas meteorite. I think: dark shock veins where it was torn - no fusion crust (even if it looks similar). Pieces in the low gram range with a surrounding fusion crust should have separated during an earlier fragmentation and would not have landed near the crater (where the meteorite pieces were found). |
John Divelbiss 3/31/2020 2:54:29 PM |
a vote for crust (w/brownish coloring) on at least the right half of the specimen. |
Bernd Pauli 3/31/2020 12:04:21 PM |
As for the incorrect 342 grams that the Met.Bull. gives, here's what I found in this scientific article: TANCREDI G. et al. (2009) A meteorite crater on Earth formed on September 15, 2007: The Carancas hypervelocity impact (MAPS 44-12, 2009, 1967-1984): The mass of the impactor was in the range 0.3 to 3 ton, and the diameter was 0.6 to 1.1 m (p. 1983). |
Bernd Pauli 3/31/2020 9:09:11 AM |
Larry, I am with you: a thin secondary crust covering the slickensides (photos 1, 3, and 6)! |
Larry Atkins 3/31/2020 7:59:09 AM |
That's a great looking piece!
Could it be a secondary,light crust on the slickensides?
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Luca Fenocchio 3/31/2020 5:32:02 AM |
Campione stupendo |
Graham Ensor 3/31/2020 4:04:56 AM |
I think slickensides...but not fusion crust. I have a couple similar that show quite clearly that the black melt drops down from the surface into the matrix. however I have also qustioned if this is true slickenside or cleaving along shock veins abundant in Carancas...or is that the same thing?. I suspect not and would be happy to hear if anyone else has views on this?
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