Would Eridu work with a LXX based chronology?

Brief answer, before even doing calculations : no, because Babel would presumably be the first post-Flood city and Göbekli Tepe is clearly gone by the even start of Eridu, and it is also pretty clearly post-Flood. I once believed Mohenjo Daro or Harappa could be remains of pre-Flood cities one of which could be Henoch in the land of Nod east of Eden. I no longer believe that, since Göbekli Tepe is not east of Eden and is older than Mohenjo Daro and Harappa.

But let's do some calculations.

We will start with a very "recent" carbon date of the Flood, 20 000 BC. We will then see how much one needs to raise the pmC for reaching lower levels of Eridu by the beginning of Babel, putting this at forty years before 529 after the Flood (full LXX, with II Cainan).

Here is a comparison between Syncellus and my usual St. Jerome (Roman Martyrology for Christmas):

Creation vs. Evolution : Syncellus A bis, B and St Jerome C & D - uncalibrated dates found, setup before making tables
https://creavsevolu.blogspot.com/2017/03/syncellus-bis-b-and-st-jerome-c-d.html

Citing (with omission of Göbekli Tepe references):

3258 BC - Flood

2764 BC - Tower of Babel Starts

2724 BC - Confusion of Tongues

2109 BC - Abraham in En Gedi

20 000 (late carbon date for Flood) - 3258 = 16742 extra years

5300 (Eridu date for beginning of Babel) - 2764 = 2536 extra years

This is a rise from 13.196 pmC to 73.582 pmC in (3258 - 2764) = 494 years (Syncellus has Peleg born 534 after the Flood, and Arphaxad 12 after the Flood).

494 years leave 94.199 pmC and therefore normally replace 5.801 pmC.

13.196 * 94.199 / 100 = 12.4305

73.582 - 12.4305 = 61.1515

And faster factor of replacement :

61.1515 / 5.801 = 10.542.

Not worse than mine in Roman Martyrology and Göbekli Tepe.

But the problem is, as said, where does this leave Göbekli Tepe?

Eridu is left for good, and its culture leaves traces all over the Middle East. Göbekli Tepe is also left for good, and its culture leaves traces in or receives traces from as far away as Polynesia (bird man) or Australia (a symbol that looks like an oblong divided into a figure eight).

From Göbekli Tepe on you have continuous agriculture in the Middle East (while "Noah was a husbandman" probably near the landing place of the Ark, the more general economy after the Flood would have been a hunter gatherer one, as for Neanderthals prior to the Flood). You cannot put Göbekli Tepe into pre-Flood archaeology.

Some have suggested that Göbekli Tepe was the altar that Noah built, Genesis 8:20 - but why would Göbekli Tepe then portray distinctly unclean animals, like a fox? Like birds of prey?

And how come decapitated skulls are found there? Sounds more like Nimrod to me. The Jew Roger Pearlman suggested Nimrod could have perverted Göbekli Tepe after Noah built it, but before getting to Babel ... this would put very great strains on how fast carbon could rise in some ten years ...

It makes more sense, Noah built the altar near the landing place, just as later the vineyard, and we know Göbekli Tepe, unlike Eridu, is West and not South of the landing place. Which Genesis 11:1 seems to indicate.

Plus, 20 000 BC is a very recent carbon date for the Flood, with an overall span from 50 000 to 20 000 in carbon dated fossils that CMI count as from the Flood. One could explain the most recent ones either with contamination from nuclear explosions or with these coming from post-Flood landslides. Let's redo it with 30 000 BC ...

3.598 * 94.199 / 100 = 3.389

73.582 - 3.389 = 70.193

70.193 / 5.801 = 12.1 times as fast. Still feasible.

But, as said, it fails by comparison with Göbekli Tepe. Those given. Only one site earlier, to which the references on the web are now lost to me, but which is West of Euphrates and so technically not in Shinar (unless the Queik river was an older river bed for Euphrates).

Plus, Eridu starting in carbon date 5300 would be contemporary to lots of other archaeological sites:

It has been estimated that humans first settled in Malta c. 5900 BC, arriving across the Mediterranean from both Europe and North Africa.[2]

Evidence of cheese-making in Poland is dated c. 5500 BC.[3]

The Zhaobaogou culture in China began c. 5400 BC. It was in the north-eastern part of the country, primarily in the Luan River valley in Inner Mongolia and northern Hebei.[4]

Four identified cultures starting around 5300 BC were the Dnieper-Donets, the Narva (eastern Baltic), the Ertebølle (Denmark and northern Germany) and the Swifterbant (Low Countries). They were linked by a common pottery style that had spread westward from Asia and is sometimes called "ceramic Mesolithic", distinguishable by a point or knob base and flared rims.[5][6][7]

Use of pottery found near Tbilisi is evidence that grapes were being used for winemaking c. 5980 BC.[8]

https://en.wikipedia.org/wiki/6th_millennium_BC

But even worse, since clearly involved in Neolithic farming, Egypt:

Neolithic culture and technology had spread from the Near East and into eastern Europe by 6000 BC. Its development in the Far East grew apace and there is increasing evidence through the millennium of its presence in Prehistoric Egypt and the Far East.

Which however comes in after Göbekli Tepe.

This may be one reason why the RATE project has not published (as far as I know) any updated versions of the table given 2015 by Tas Walker:

CMI : A preliminary age calibration for the post-glacial-maximum period
by Tas Walker
http://creation.com/age-calibration-for-post-glacial-maximum-period

And I update and update (latest tables here : Tables de carbone 14 sur les bases révisées (I - VI) and Tables continués (VI - IX)*)

Ultimately, I think my view of what happened after the Flood makes more sense than the one of CMI - the differences are mainly in detail, but it may be important that Nimrod's realisation of a popular vote project was technocratic rather than superstitious or that Neanderthals came in both good vegetarians and evil meat eaters who also ate men ... (one of my reasons to place them before the Flood, and I presume the Neanderthal genome on the Ark came from Spain rather than Belgium).

Hans Georg Lundahl
Paris
Pope St. Pius I
11.VII.2020

* Biblical events : I Flood, II death of Noah / beginning of Babel, III birth of Peleg / end of Babel, IV Genesis 14, V Joseph's Pharao's coffin (Djoser's), VI birth of Moses at death of Sesostris III, VII Jericho taken, VIII Troy taken, IX Temple of King Solomon). Yes, taking of Troy is not strictly Biblical, but like founding of Rome taken into account by Biblical chronologies (like when stating Christ was born 752 after founding of Rome). Not yet available in English.