Recalibrating American Archaeology (very roughly)

1) Recalibrating American Archaeology (very roughly), 2) Recalibrating Irish Archaeology

Timeline of Americas, with some dependence on Raff and Bolnick (who seem to depend on Rasmussen et al.) and on Ortmann and Kidder.

As with my French language recalibration of Pre-Nuraghic Sardinia, I use my tables from essays Multiples Échecs (but do not try to recalculate into BC, leaving BP, as originally, and with me here it means before 2015, not before 1950) and from Avec un peu d'aide de Fibonacci, marked ME and Fib., but I also first use an earlier attempt by Tas Walker, here marked TW. I had earlier used it for Chronologies Comparés sur le Progrès Post-Diluvien.

I have not tried to break it down very finely, but mostly been content to use the values given in tables even for very approximate dates.*

What	When: conventionally	TW	ME	Fib.
Early movement into NW Beringia	30,050 BC	2050 BC	4972 BP	2957 BC
Last Glacial Maximum begins	26,050 BC	2050 BC	4972 BP	2957 BC
East Beringia terminus post quem	24,050 BC	2050 BC	4972 BP	2957 BC
Mal'ta Siberia genome	22,050 BC	2050 BC	4842 BP	2957 BC
Solutrean Culture begins (b)	21,550 BC	2050 BC	4842 BP	2957 BC
Earliest Solutrean tools (a)	19,050 BC	2025 BC	4842 BP	2957 BC
East Beringia terminus ante quem	16,050 BC	2025 BC	4712 BP	2957 BC
Last Glacial Maximum ends	16,050 BC	2025 BC	4712 BP	2957 BC
Latest Solutrean tools (a + b)	15,050 BC	2000 BC	4582 BP	2778 BC
Deglaciation of Pacific, ante quem	15,050 BC	2000 BC	4582 BP	2778 BC
Monte Verde, Chile	12,650 BC	2000 BC	4452 BP	2778 BC
Icefree corridor between Cordilleran and Laurentide ice sheets, tpq	11,550 BC	1975 BC	4452 BP	2778 BC
Clovis Culture begins (b)	11,350 BC	1950 BC	4452 BP	2778 BC
Clovis Culture begins (a)	11,050 BC	1950 BC	4452 BP	2778 BC
Anzick-1	10,757 - 10,606 BC	1950 BC	4322 BP	2778 BC
Clovis Culture ends (b)	10,850 BC	1950 BC	4322 BP	2778 BC
Clovis Culture ends (a)	10,650 BC	1950 BC	4322 BP	2778 BC
Kennewick Man	6740 - 6450 BC	1900 BC	3802 BP	2599 BC
European gene pool unity since about	6050 BC	1875 BC	3802 BP	2599 BC
Mesolithic Spanish genome	5050 BC	1850 BC	3672 BP	2509 BC
Poverty Point [Earliest] Mounds**	4050 BC	1750 BC	3542 BP	2420 BC
Limit : Earliest inhabitants vs Later ones	3050 BC and earlier	1600 BC and earlier	3022 BP and earlier	2241 BC and earlier
Mid Siberian Migration (latest being AD)	2050 BC	1450 BC	3022 BP	1972 BC
Saqqaq genome	2050 BC	1450 BC	3022 BP	1972 BC

For this timetable, I used:

Genetic roots of the first Americans
Jennifer A. Raff & Deborah A. Bolnick
Nature vol. 506 13-II-2014, 162 - 163 + Academia.edu

Does Mitochondrial Haplogroup X Indicate Ancient Trans-Atlantic Migration to the Americas?
A Critical Re-Evaluation
same authors
PaleoAmerica 2015 Vol. 1 No.4 297 - 304 + Academia.edu

AND

Building Mound A at Poverty Point, Louisiana:Monumental Public Architecture, Ritual Practise, and Implications for Hunter-Gatherer Complexity
Anthony L. Ortmann and Tristram R. Kidder
Geoarchaeology. An International Journal 28 (2013) 66-86 + Academia.edu

Obviously, I could have gotten same dates from a book or two, but here I am also referencing research, which, apart from time table (where I think me and Tas Walker would be more to the point), pretty interesting.

Hans Georg Lundahl
Nanterre UL
St Hilary of Poitiers
14-I-2016

* Meaning where originally given dates are varying, the recalibration dates may be same, just because I am not breaking it down to more exact correspondences. ** Actually it is earliest mounds which are from 6000 BP/4050 BC, conventional dates, while Poverty Point is from 4000 BP/2050 BC, conventional dates - like the Saqqaq genome. I looked for a year and overlooked the first one, which was the relevant one, and thought ... OK, got it wrong. Here is fixing it. And some more from Ortmann/Kidder, to make up for sloppiness:

Hiatus of mound building (p.67): 4800 BP/2850 BC to 3600 BP/1650 BC which started a new building time up to 3400 BP/1450 BC.

Recalibrations:

Tas Walker: 3600 BP/1650 BC to 3200 BP/1250 BC which started a new building time up to 3050 BP/1100 BC.

Multiples Échecs table: 3758 BP/1743 BC to 3455 BP/1440 BC which started a new building time up to 3412 BP/1397 BC.

Fibonacci inspired table: 2062 BC to 1525 BC which started a new building time up to 1346 BC.

Several pages later in the paper:

Fuller (calibrated) chronology, just recalibrating by the Fibonacci table:

Mound A Platform

Core A-26, 2Ab 2190-2181 BC, rec. bef. 1793 BC
Core A-15, Ab 1429-1257 BC, rec. 1346-bef.1167 BC
South Profile, Excavation 2Ab 1425-1252 BC, rec. 1346-bef.1167 BC

Mound A Cone, Core A-88 1374-1340 BC [closest I get by arithmetic means of years given in table on right hand side is 1363-1348 BC, later and earlier than your here given] bef. 1286 BC-af.1274 BC [reached by corresponding arithmetic means of years given in table on left hand side.]

1319-1110 BC [1326-1117] af.1256-af.1077 BC
1103-1072 BC [1107-1072] af.1068-1038 BC
1067-1056 BC [1067-1051] 1032-af.1024 BC