OK, so I'm alone, unbothered and sitting comfortably in front of a large screen and keyboard. Time to discuss limestone and, given that shroudies are involved, lies, fraud and stupidity. Fetch a beverage, sit down and relax, this may be a bit long. I'm in the mood to finish this particular nonsense once and fore all.
Are you sitting comfortably? Then I'll begin.
Firstly the basics; limestone is chemically, mostly, calcite a form of calcium carbonate. It's a sedimentary (or secondary if you remember your geological classifications) form of rock created by the accumulation of marine debris, mostly sea shells. It's rather useful stuff in industry and agriculture, and of course in pedagogery. The constituents and impurities can be useful in determining it's source. It's also a common matrix for fossils (remember Mary Anning?).
Specifically regarding the shroud, "limestone" is bandied about by shroudies to cover certain material removed (allegedly) by tape lifts, that is adhesive tape applied to the surface of the cloth to collect particulates there.
- As an aside Max Frei did not invent this technique, that's a lie promulgated by his supporters. It was used in criminology before him.
Now these alleged tape lifts (I'll some to why I use 'alleged' in a moment, be patient) allegedly recovered dust, pollen and other materials. I shall leave the Frei pollen nonsense aside for the moment as even the hardcore shroudies tend to play down that particular brand of nonsense these days.
Now Frei removed material from the shroud in 1973 and made a number of claims. Mainly he concentrated on the pollen but he made a number of (unpublished) assertions regarding microscopic analysis of the 'dirt' removed.
Let us more on to 1978 when the shroud was being subjected to various poorly controlled spectrographic analyses. Our old friend Ray Roger (no relation) was involved in that (remember STURP?) and (it is claimed) that an odd result was encountered at the heel of the picture. Now John Heller (mainly in his book
Report on the Shroud of Turin) devotes pages to the supposed excitement caused by this, inventing much dailogue for the book.
Of course he wasn't actually there.... Oh and the account of the Gilberts' (Roger and Marty) doesn't match with theirs.
Now their published work ('Ultraviolet-visible reflectance and fluorescence spectra of the Shroud of Turin’) lists five spots with unusual spectral results. Specifically two on the foot stain and three other nearby points. They also make no reference to 'dirt', 'rock' or 'limestone'. Oh and their graphs show no differences between these locations and elsewhere.
Remember this.
In 1986 enter one Joseph Kohlbeck (who worked for Hercules Aerospace as a microscopist specialising in metals, not rocks or soil) and who was an old friend of a Rogers was sent some samples for analysis. Note the lack of provenance.
He published a "paper" (the scare quotes are
entirely intended) called 'New Evidence May Explain Image on Shroud of Turin: Chemical Tests Link Shroud to Jerusalem' in a magazine called Biblical Archaeology Review.
This is not a 'journal', no matter what the shroudies may say, and has no peer review or other safeguards.
The lifted dirt was sent for analysis to Ricardo Levi-Setti (at the Enrico Fermi Institute) electron probe analysis.
Now the problems with this article are legion; lack of experience (his co-author Eugenia Nitowski was an archaeologist, we'll get back to her in a moment), lack of comparison samples (they only compared the 'dirt' to samples taken in modern Jerusalem rather than, say, France) and lack of verified provenance for the supposed shroud samples.
- As an aside, for anyone interested in the composition of limestone around Jerusalem, I recommend 'The Influence of Karst Aquifer Mineralogy and Geochemistry on Groundwater Characteristics: West Bank, Palestine’ in Water in 2018. It's examples show a distinctly different composition to that used to compare the alleged shroud sample.
Also the article published images of the graphs that were fuzzy and tiny. They're also listed as being "adapted by E. Nitowski" which is odd.
Now Kohlbeck clamed that
This, to use my favourite descriptor, bollocks.
Now I won't be going in to microscopic (hah!) details on the results. But let's take a look
- One of the main problems with analysing the article is the awful graphs. One might speculate that the were intended, in size, fuzziness and use of log/log scales, to be deceptive....
- Did I mention that Eugenia Nitowski was also Sister Damian of the Cross?
Anyway, there are better versions of the graphs around, though you have to look for them. I recommend Nitowski's unpublished 'The Field and Laboratory Report of the Environmental Study of the Shroud in Jerusalem'. I'm sure
@bobdroege7 can supply a link to this important document for those interested.
Examining the graphs shows massive discrepancies that immediately invalidate Kohlbeck's assertion of an "unusually close match". Some data extraction to find the real numbers is rather interesting.....
- Now my first time using the forum's table function. OK that did not work, C&P it is.
| Element or isotope | Alleged shroud fibres | Alleged Jerusalem tomb |
| Aluminium | 55 | >2000 |
| Calcium 40 | 10000 | 4100 |
| Calcium 42 | 50 | 22 |
| Calcium 44 | 150 | 66 |
| Chromium 52 | 25 | <20 |
| Gallium 69 | 75 | 800 |
| Gallium 71 | 25 | 360 |
| Iron 56 | 160 | 85 |
| Iron 57 | 190 | 105 |
| Lithium | <20 | 130 |
| Magnesium 24 | 160 | 520 |
| Magnesium 25 | 35 | 100 |
| Magnesium 26 | 50 | 100 |
| Potassium 39 | 176 | 4600 |
| Potassium 41 | 105 | 340 |
| Silicon 28 | 20 | 320 |
| Silicon 29 | <20 | 22 |
| Sodium | 700 | 2800 |
Now,. do those results look like an "unusually close match"?
To summarise. The alleged limestone on the shroud that is claimed to be identical to that from Jerusalem falls on a number of grounds.
- There is no certainty that the supposed shroud sample is genuine.
- There is no range of control samples, for example from near to where the shroud first emerged in France.
- There is no certainty that the supposed Jerusalem sample is representative of that locality.
- The motivations of those who wrote the report are questionable.
- The data simple doesn't match up with the claims made for it.
Fast forward to 1988 and it's both a high and a low point for "shroud research". Firstly
Real Science is paying attention!!!, in the form of actual experts and cutting-edge radiocarbon dating. Then October 13th rolls around and Disaster!!!
Science says it's a medieval fake.
View attachment 58885
This leads to the whole nonsense about invisible patches and fakery in a pathetically desperate attempt to explain away the results.
That same year saw shroudie John Jackson claim that there was "an abundance of microscopic dust or dirt" in an article he wrote for Shroud Spectrum International. This seems to have kickstarted a tradition of shroudies frequently claiming that numerous samples were found, and sometimes identified, on the knee, the nose and elsewhere.
Curiously two papers (Eric Jumper’s 'A Comprehensive Examination of the Various Stains and Images on the Shroud of Turin' and 'Physics and Chemistry of the Shroud of Turin' by our old friends Schwalbe and Rogers) make no such claims.
Conclusion.
There is no evidence of limestone per se on the shroud. The samples which may or may not have been taken from the cloth show no close match to any samples of Middle Eastern limestone.
The shroud remains, definitively, a medieval fake.
So
@bobdroege7 will you accept the facts? Or return to conspiratorial/denialist mode?