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Like dog years?


You report on new age dates for Clovis Clovis.

1 City (1990 pop. 50,323), Fresno co., S central Calif., near the foothills of the Sierra Nevada range; inc. 1912. It is a growing trade center in a farm and vineyard area; the population more than tripled from 1970 to 1990.
 sites ("New age for ancient Americans," SN: 3/3/07, p. 141). It may be of interest to your readers that the dates given (11,050 to 10,900 years ago) are in "radiocarbon ra·di·o·car·bon  
n.
A radioactive isotope of carbon, especially carbon 14.


radiocarbon
Noun

a radioactive isotope of carbon, esp.
 years" and are not in real or "calendar years." As a result of variations in the production of carbon-14 in the atmosphere through time, radiocarbon years have a certain percentage of error, depending on age and type of material. For example, the radiocarbon date of 11,000 years is actually equal to approximately 13,000 calendar years.

BRUCE Bruce, Scottish royal family descended from an 11th-century Norman duke, Robert de Brus. He aided William I in his conquest of England (1066) and was given lands in England.  BARTLESON, GUNNISON, COLO Colo Colorado (old style state abbreviation)
COLO Columbus, Ohio
COLO Co-Location
COLO Colonial National Historic Park (US National Park Service)
COLO Cost Of Living Option
.
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Title Annotation:LETTERS
Author:Bartleson, Bruce
Publication:Science News
Article Type:Letter to the editor
Date:May 12, 2007
Words:103
Previous Article:Saw right through it.(LETTERS)(Letter to the editor)
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