GSA Bulletin ;; 69 2 : — in the potassium-argon dating program at Berkeley are reported. Geologically well-classified authigenic sediments ranging from Miocene 12 m. Age ka dating of seven glauconites from the Oligocene 30 m. Ages of three Miocene glauconite samples from New Zealand are anomalously high compared to those of the Oligocene samples, which may be too low. The age for an Albian glauconite from Canada is too high compared to that of other samples dated.
Anno Dominiyear of the Lord and B. Before Christ have long been used by archaeologists in Europe and the Americas; their reference point is the birth of Christ.
Current Era and B. Before Current Era are sometimes used instead of Ka dating. But the dates themselves are exactly comparable to dates expressed as A. For example, C. Before the Present is the of years before the present. Because the present changes every year, archaeologists, by convention, use A. So, B. For example, the entry of humans into the New World during the Pleistocene Ice Age is thought to have occurred by about 15, years ago, or 15 ka which is equivalent to approximately 13, B.
What do different date abbreviations mean?
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