I am. That's what I'm doing. That's why I'm on message boards. Not to quarrel -- but to LEARN.
Did you read the UNESCO report? It makes NO CLAIM that SubSaharan invention FED the world as Asclepsias declared.
This Gerard guy is the seminal source. And HIS work at Egaro has been widely criticized. Because the few iron relics they found were not analyzed and dated. The surrounding POTTERY was dated and assumed to be of the same date range when the ground they all came from was in a place where the "stratification" assumption does not clearly hold.
https://muse.jhu.edu/article/187874/pdf
A place named Egaro some 40 miles west of the Termit Massif has
yielded even earlier dates. Two potsherds found near iron objects on surface
sites were dated by calibration to 2900-2300 and 2520-1675 BCE.
This has been seen as confirmation that iron metallurgy in Niger goes
back deep into the second millennium BCE.112 However, Quéchon himself
cautioned that the finding “lacks the critical apparatus that would allow
it to be totally affirmative.”113
Quéchon’s data and conclusions on Termit have been widely accepted,
but a few specialists contend that his case is seriously flawed. The principal
criticism is that there is no real proof that the (reliably-)dated potsherds
found in association with metal objects or charcoal are contemporaneous
with them. Pottery making at Termit may indeed go back 7000
years. The sherds found with metal and fuel were apparently all recovered
from what archeologists call deflation surfaces. These are formed by
winds blowing away soil or sand and thereby mixing artifacts from different
periods. Normally archeologists rely on stratigraphy to determine
whether associated materials are contemporaneous, but in very arid regions
like Termit this is usually impossible, and Quéchon has produced
no stratigraphic evidence.
Critics charge that such assertions are insufficiently documented. Qué-
chon’s claim that iron objects were always found with the same range ofpottery types has to be taken on faith, they say, because he has not published
an adequate number of illustrations. Detailed drawings of the surface
material have not been forthcoming. David Killick challenges Qué-
chon’s claim that potsherd and charcoal dates from the same surface scatters
agree in convincing fashion. He says that “this is not at all obvious”
from the table presented, and instead finds some of the coupled datings
rather far apart.116
No archeometallurgist has ever accompanied Quéchon to Termit, and
Killick deplores the absence of any metallographic or chemical study of
the iron artifacts, which, he suggests, might have been made of meteoritic
iron rather than smelted metal.117 The recently developed technique that
can date iron directly, known as accelerator mass spectrometry (AMS),
seems not to have been tried.118
At best it seems that parallel development may have taken place there. And there is not solid evidence that SubSaharan developments in metallurgy were TRANSFERRED far from where they occurred.
Again iron is not the same as carbon steel. Its not hard to figure out if you truly want to learn. Kinda obvious you are just in denial.
One step at a time. Since the only real metal objects found at those sites don't appear to have been actually analyzed in any 21st century kind of way. We're a LONG way from documenting evidence on carbon steel. The theory that their furnaces were "hollowed out banana trunks" SPAWNED that speculation. Because of natural infusion of carbon into the early cooking. But all that is SECONDARY to actually finding ENOUGH of the 1500BC stuff to PROVE it was even smelted and not worked from meteoric iron or other ways.
Paper I linked to appears to be someone's thesis in 2005. It's a good read from about page 68 or 70 if you WANT the details.
Who told you they were not analyzed in any 21rst century way? The researchers watched as the Hayas went through the process. Any lack analysis you may feel appears that did not occur doesnt give you licence to then say it didnt happen. Again iron is not carbon steel which was the original point. Until you can prove anyone produced carbon steel prior to the Hayas in europe then my facts stand as is. Whites were 300 years behind the Hayas in producing carbon steel.
Watching "as they go thru the process" in NO WAY dates that process -- does it? It's all from folklore that doesn't have a reliable timeline back millenia. And it first has to be documented that Haya steel IS carbon steel. There are samples and NO EXCUSE to not date it. Not simply date the pottery around it. Because if it IS carbon steel -- it can be Carbon isotope tested. If it's NOT -- it may still be subject to AMS testing or contain enough contaminants to be proven.
I don't think the UNESCO summary would have passed on the carbon steel claim and been so "reserved" about the metallurgy claims if that had happened..
Damn. My math was way off. Thanks for prompting me to look it up again.
They radiocarbon dated the coal in the furnaces. If you actually consider that the process didnt just pop up out of thin air then you realize that the process is obviously much older.
IRON AND STEEL, THEIR HISTORY AND PRODUCTION | Facts and Details
"
Africans Invent Steel 1,900 Years before Europeans
The Haya people on the western shore of Lake Victoria in Tanzania made medium-carbon steel in preheated, forced-draft furnaces between 1,500 and 2,000 years ago. The person usually given credit with inventing steel is German-born metallurgist Karl Wilhelm who used an open hearth furnace in the 19th century to make high grade steel. The Haya made their own steel until the middle of the middle 20th century when they found it was easier to make money from raising cash crops like coffee and buy steel tools from the Europeans than it was to make their own. [Source: Time magazine, September 1979]
The discovery was made by anthropologist Peter Schmidt and metallurgy professor Donald Avery, both of Brown University. Very few of the Haya remember how to make steel but the two scholars were able to locate one man who made a traditional ten-foot-high cone shaped furnace from slag and mud. It was built over a pit with partially burned wood that supplied the carbon which was mixed with molten iron to produce steel. Goat skin bellows attached to eight ceramic tubs that entered the base of the charcoal-fueled furnace pumped in enough oxygen to achieve temperatures high enough to make carbon steel (3275 degrees F). [Ibid]
While doing excavations on the western shore of Lake Victoria Avery found 13 furnace nearly identical to the one described above. Using radio carbon dating he was astonished to find that the charcoal in the furnaces was between 1,550 and 2,000 years old. [Ibid]
Steelmaking was invented in Europe around 1860, when it was discovered that a blast of air through molten pig iron removed impurities such as sulfur that made the metal brittle. Later it was discovered that adding an iron alloy containing manganese and limestone removed the remaining impurities---oxygen, phosphorus and leftover sulfur---producing steel. Other developments such high carbon steel, adding chromium alloys, blast furnaces made steel stronger."
I'm not in denial. I'm an academic by nature. I don't take Time Magazine as fundamental PRIMARY source of evidence like the blog you quoted. From the John's Hopkins paper I quoted before -- Same 2 guys Schmidt and Avery with the WHOLE analysis.
Part of the CONFUSION HERE is that your blogger was snipping articles out of Time Magazine in 1979 BEFORE all that work was "peer reviewed" and revised in subsequent decades. Same 2 guys Schmidt and Avery sing a slightly different tune later on..
https://muse.jhu.edu/article/187874/pdf
Starting in 1969, Schmidt elicited and unearthed a great deal of information—ethnographic
and oral-historical as well as archeological—about
the Haya people, who live in the northwest corner of Tanzania, between
Lake Victoria and the borders of Rwanda and Burundi, in a district
known as Buhaya. Haya traditions about iron production led him to
prospect an ancient shrine at a site called Rugomora Mahe. The remains
of a forge and other features linked to iron metallurgy
there were dated to
the mid-first-millennium BCE.152 Schmidt thinks that earlier dates obtained
in the area derive from the charcoal of forest fires that long predated
ironworking.153 He is inclined to believe that iron smelting was independently
invented in Africa, but says the hypothesis “awaits substantiation.”
and has conceded that “[k]nowledge of iron production may ultimately
derive from Europe or Asia.”154 Meanwhile, he has credited
African smelters with inventing certain iron-making techniques, about
which more later
The oldest dates for ironworking in the Great Lakes (Victoria) region come from
Rwanda and Burundi. Belgian archeologists led by Marie-Claude Van
Grunderbeek worked in both countries between 1978 and 1986 and
found equally ancient iron-smelting remains on the Central Plateau that
the two share.
The Burundi finds consisted only of fragments of furnace
shafts and scattered slag, but in Rwanda, near the town of Butare (meaning
“iron” in the local language), a wealth of evidence turned up—charcoal
and tuyères as well as shaft fragments and slag—and 20 iron smelting
furnaces were excavated. All the discoveries were associated with ceramics
characterizing a culture known to specialists as Urewe.155
In 1980 van der Merwe claimed that ancient African metallurgists had
“devised a smelting technology which is apparently unique, producing
high carbon steel directly from the furnace” rather than by subsequent
smithing.186 Two years later he and American engineer Donald H. Avery
explained that the innovation involved increasing the carbon content of
the bloom, i.e., carburizing it, in various types of African furnaces.187
Steel is iron alloyed with between 0.2% and 2% carbon, and there is no
doubt it was widely manufactured in Africa from early times. Killick
agrees that “many African iron smelters were able to produce high-carbon
steel directly in the bloomery furnace,” but convincingly refutes the
claim that it was a unique achievement.
He points out that “steel
blooms similar to those from Africa were produced in some areas of Europe
at least as early as . . . 500-100 B.C.,” and concludes that Africans
made steel “within the normal range of variation of bloomery
processes.”188 Nevertheless, this does not rule out the possibility that the
direct process was independently invented in Africa.
The third claim, summed up, a bit misleadingly for the layman, as
“preheating,” has stirred hammer-and-tongs debate. It refers to the use of
extra-long clay tuyères inserted deeply into the smelting furnace so that
the blast of bellows-driven air is heated within the furnace just before it
reaches its fuel-and-ore target, achieving very high temperatures.
In a series
of publications beginning in 1978, Schmidt and Avery contended that
Haya smelters in Tanzania invented the process nearly two millennia before
it was patented in England.189 They were disputed on a number of
points by other scholars.190 For non-specialists the argumentation in this
controversy is recondite. According to Killick, “the case for preheated
blast in the Haya furnace is . . . not proven,” but neither, it would seem,
is it disproven.19
--------------------------------
Not attempting to denigrate the early achievements in Africa. But we're FAR from claiming that Africans "taught the world". It's impressive to learn about this. I AM impressed. The fact that there are not TONS of relics is probably due to the harsh tropical environments degrading the stuff to rusty dirt compared to the TONNAGE of artifacts surviving from the NORTH of Africa and other places.
This ain't a competition to me. I WANT to be correct. And the more important thing is why this "early start" didn't result in continuing progress in metallurgy into the Modern Age.