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Determining the authenticity of purported pre-Columbian

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Determining the authenticity of purported pre-Columbian [#permalink] New post 24 Mar 2005, 18:37
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Determining the authenticity of purported pre-Columbian artifacts is never easy. Carbon-14 dating of these artifacts is often impossible due to contamination by radioactive palladium (which occurs naturally in the soils of Central and South America). However, historians and anthropologists have evolved two reliable criteria, which, utilized in combination, have proven effective for dating these artifacts. First, because authentic pre-Columbian artifacts characteristically occur in a coarse, granular matrix that is shifted by major earthquakes, they often exhibit the unique scratch patterns known as gridding. In addition, true pre-Columbian artifacts show a darkening in surface color that is caused by centuries of exposure to the minute amounts of magnesium in the soil of the Americas.

The criteria above would be LEAST useful in judging the authenticity of which of the following?

(A) An ax head of black obsidian, unearthed from a kitchen midden
(B) A pottery bowl with a red ocher design, found in the ruins of a temple
(C) A set of gold ear weights, ornamented with jasper pendants
(D) A black feather cape from a king’s burial vault
(E) A multicolored woven sash found near the gravesite of a slave
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 [#permalink] New post 25 Mar 2005, 09:15
between D and E.
You can't say if black can get any darker but you can see gridding on the stem of the feather if the vault was ruined and found under fround.
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 [#permalink] New post 25 Mar 2005, 09:33
polinayurr wrote:
between D and E.
You can't say if black can get any darker but you can see gridding on the stem of the feather if the vault was ruined and found under fround.


Must be D. If the vault had been destroyed, it will not be mentioned. right ?
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 [#permalink] New post 25 Mar 2005, 09:54
should be D.

because it is already black, you cannot tell whether it is caused by centuries of exposure to the minute amounts of magnesium in the soil.
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 [#permalink] New post 25 Mar 2005, 10:12
so brilliant.

Agree with your thought!

D it is.
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 [#permalink] New post 26 Mar 2005, 05:26
OA is D
  [#permalink] 26 Mar 2005, 05:26
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