Word: carbone
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...well that the species can be identified easily after many thousand years. Pollen grains are especially useful. Birch pollen found at a certain level of an ancient peat bed is proof that the climate was cold when the peat was formed. If the peat is dated by its carbon 14 content, the actual age of the cold period can be determined...
Besides the copied drawings, the expedition brought back tools, mortars for grinding colors, personal ornaments, even pearls from some distant sea. Some of the finds contain carbon and can be dated by radioactive carbon 14. When this has been done, and when scholars have studied the drawings and artifacts, a history of a sort can be written of the fertile river plateau that slowly died of thirst after the glaciers melted...
Through professional archaeological friends, the amateurs got their hearth dated by a new carbon 14 apparatus in the laboratory of the Humble Oil & Refining Co. at Houston. Last week Crook and Harris were celebrating the second and bigger climax: the charcoal had proved to be 37,000 years...
Ancient Hearths. Diggers' discoveries nowadays are apt to have two moments of climax: 1) when the article is found, and 2) when its age is determined, often months later, by the carbon 14 process...
...have always been considered older than the fully fluted Folsom points, but no one was sure just how old they are. Commonest guess was 15,000 years. But the discovery of a Clovis point in a campfire hearth containing charcoal made it possible to date the Clovis culture by carbon...