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A dust explosion is the fast combustion of dust particles suspended in the air in an enclosed location. Coal dust explosions are a frequent hazard in underground coal mines, but dust explosions can occur where any powdered combustible material is present in an enclosed atmosphere.
Many materials that are commonly known to oxidise can generate a dust explosion, such as coal, sawdust, and magnesium. However, many otherwise mundane materials can also lead to a dangerous dust cloud, such as grain, flour, sugar, powdered milk and pollen. Many powdered metals (such as aluminium and titanium) can form explosive suspensions in air.
The dust can arise from activities such as transporting grain, and indeed grain silos do regularly have explosions.
On May 2, 1878, the Washburn ‘A’ Mill — the largest flour mill in the United States at that time — exploded. The mill exploded when flour dust in the air inside it ignited. The explosion claimed 18 lives, decimated the surrounding area, and brought instant notoriety to Minneapolis. The tragic explosion led to reforms in the milling industry. Ventilation systems and other precautionary devices were devised in order to prevent further tragedy.
On May 2, 1878, at 7:10 p.m., a spark ignited flour dust in the Washburn A Mill. The explosion that followed blew the mill’s concrete roof several hundred feet in the air and leveled the seven and a-half story limestone building. The nearby Humboldt and Diamond Mills also were flattened by the explosion, and one third of the city’s business district was destroyed by the fire. The explosion broke windows as far away as Summit Avenue in St. Paul, and limestone blocks landed in yards eight blocks from the milling district.
Originally posted by SLAYER69
reply to post by Druscilla
There might be something to this many of the Egyptian Pyramids for example show large cracks as if from a possible internal blast of some sort and many had once upon a time thick residue on the walls originally before the modern Egyptians cleaned them for the tourist industry
There is ample evidence around the world for some sort of large scale destruction, could also explain why some sites show vitrification from intense heat of some sort. Interesting theory
S & F
... it suggests that food, more particularly grain, had the potential to bring powerful Mycenaean city states, including Knossos, to their knees.
Now if this was just a question of the lack of food or even a surplus of bad food there would be nothing to say ... But Pylos and Knossos and Zarkos seem all to have been destroyed by conflagrations in the very early centuries BC and these conflagrations may have had their origin in the local grain supply.
Originally posted by bigfatfurrytexan
Well, i wouldn't really expect neolithic grain silos to actually create the kind of heat needed for vitrification. My initial thoughts on this are that it is a great, great theory. But for places like Mohenjodaro, not quite so applicable.
Originally posted by ancientthunder
we meet again, here is one idea well worth considering which should fit your current mind set.
en.wikipedia.org..." target="_blank" class="postlink" rel="nofollow"> en.wikipedia.org...