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annual growth ring

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annual growth ring [′an·yə·wəl ′grōth ‚riŋ]
(botany)


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There are of course neither satellite images nor instrumental records of the climate all the way back to the 13th century, but nature has its own 'archive' of the climate in both ice cores and the annual growth rings of trees.
Many fish scales, particularly those of species that live in cooler, temperate waters, show annual growth rings, and counting these rings can give the age of the fish.
Sereno and associates then opened an expansive quarry, excavating more than 25 individuals ranging in age from 1 to 7 years, as determined by the annual growth rings in their bones.
 
 
 
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