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A summertime rainy season in the Arctic forests of the Eocene.

The environmental water of the Middle Eocene Arctic: Evidence from δD and δ18O within specific compounds. doi: 10.1073 pnas.0809870105.(view/download pdf) R.

A number of variables feature in this consideration, one of the most important concerns the environment within which the sample was deposited.

The lab must consider the possibility of contamination in each sample it dates and depends upon information supplied by the submitter and collector of the material for its assessment.

Distinguishing the nature of tool residue: chemical and morphological analysis of bamboo and bone tool residues.

When the C14 method was originally developed, Libby and his research team had to assume that the ratios of the carbon isotopes they were measuring had been altered only by 14C decay (Taylor, 1987:3) and that the sample material accurately represented the event to be dated.

A preliminary test of the press-pulse extinction hypothesis: Palynological indicators of vegetation change preceding the Cretaceous-Paleogene boundary, Mc Cone County, Montana, USA.

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