From Joseph to Jericho ... one of the ways

I was looking up one of the articles I used for carbon dating issues. I saw that the medium carbon date, averaged over different samples, for the Burial Boat of Sesostris III was to 3500 sth before present in Libby dates.

I converted it to Cambridge dates uncalibrated except as to halflife 1713 BC.

This is interesting, because in this article on CMI ...

Searching for Moses
by David Down
https://creation.com/searching-for-moses

... Sesostris III is cited as probably dying just before Moses was born, since his successor Amenemhet III was probably the pharao ordering slaughter of infants, and since he probably survived to after Amemehmet IV / Moses had to flee after killing an overseer.

This would place Sesostris III's death at near 1590 BC, since Moses was 80 years in the Exodus 1510 BC - according to St Jerome. Djoser's coffin from 2600 BC is already tied to his being Joseph's Pharao, to 1700 BC sth.

I will add the Kenyon date 1550 BC as relevant to Biblical date 1470 BC fr Jericho - even while knowing some dispute relevance, preferring the 2200 BC walls ...

	Djoser		Sesostris III		Jericho		Distances
Real Date	1710 BC		1590 BC		1470 BC		1710 1590
Carbon Dated	2600 BC		1713 BC		1550 BC		1590 1470
Extra Years	890		223		80		0220 0120
Carbon level, pmC*	89.793		97.338		99.037

From Djoser to Sesostris III, if the Biblical alignments are correct, we would then have in 220 years a rise from 89.793 pmC to 97.338 pmC. How many % would the 89.793 pmC degrade? Same as the pmC in an object from 220 years ago. To 97.374 % of original. That is, of 89.793 pmC. With no new carbon one would have 87.435 pmC.

97.338 - 87.435 = 9.903 pmC points of carbon added to atmosphere.

Now, normal compensation for the decay would be ... 2.626 pmC points.

9.903 : 2.626 = 3.7711 times as fast addition of new carbon 14.

From Sesostris III to Jericho, same proviso, we would then have in 120 years a rise from 97.338 pmC to 99.037 pmC. How many % would the 97.338 pmC degrade? Same as in pmC of objects 120 years old, 98.559 % of original. That is, in this case, of not 100 but 97.338 pmC, to 95.935 pmC.

99.037 - 95.935 = 3.102 pmC points of carbon added.

Normal compensation would be 1.441

3.102 : 1.441 = 2.153 times as fast addition of new carbon 14.

This means, the addition of new carbon 14 would be slowing down. From near four times as fast as at present to a little more than twice as fast.

Let's project this another 120 years past Jericho, to 1350 BC.

99.037 pmC would degrade 98.559 % to 97.61 pmC. But add not 1.441 pmC points to 99.051, but rather instead 3.102 pmC points, you will get to 100.712 pmC ... objects will date to 60 years younger than they are.

On the other hand, as 2.153 times as fast is already slowing down compared to 3.7711 times as fast, one would expect even some further slowing down. If this holds, the real and carbon dates would be coinciding roughly since about 1400 BC.

Hans Georg Lundahl
Cergy, Astrolabe
Sts Sulpicius and Servilian
20.IV.2018

* for pmC levels after so and so many years decay after an initial presumed 100 pmC, as always these days:

Carbon 14 Dating Calculator
https://www.math.upenn.edu/~deturck/m170/c14/carbdate.html

(These days = I previously used another carbon calculator, which is now down. Short link to this one = http://ppt.li/3m8)