ybp
4
9.9
- noun
- Specialized
:
a.C.
- All available P312 and U106 haplotypes give their common ancestors in both cases around 3700 and 4200 ybp, respectively.
Examples
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If he meant data on 2000-3000 ybp, I do not see any conflict.
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There are plenty of L23 in the Caucasus and Anatolia, all with 6000 ybp.
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If you have another way to explain where I have gone before 3400 ybp, please do me a favor and explain.
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If he had provided data for R1a1 in Europe older than 4600 ybp, there would be no conflict either.
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However, as you probably know, I in Europe had a severe bottleneck around 3400 ybp.
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In other words, both P312 and U106 should be about 4800 ybp old.
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Then, when IE language began to split into branches (presumably in Europe) 6000 ybp, do you "see" R1b1a2 in Europe?
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If R1a and I1 were wiped out 4600 ybp but were found 3000 ybp, it is no problem.
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For R1b1a2, there are only recent data, and in one case for 5,000 ybp, excavated R1b1a2 were not found (in France).
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Archaeologists have found tools dated to around 5000 ybp that provide insight into early human life.
Surface Forms
Morphology
ybp = y + b + p
Orthographic acronym formed from the initial letters of 'years before present'; the components correspond to common words but the abbreviation and the technical convention (reference year 1950) require domain knowledge, so it is not fully transparent to a general B1 learner.
Etymology
Ybp is a scientific short form of years before present, which literally means 'years before the present'. Scientists use the fixed year 1950 as the 'present', so 10,000 ybp means 10,000 years before 1950.