mineral dust

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mineral dust

A very finely divided mineral product, the greatest bulk of which will pass through a 74-micron (No. 200) sieve; the most common such material is pulverized limestone.
References in periodicals archive ?
This was one of the very few times that a dark nebula has appeared to be significantly larger than plotted in the MSA, but Antonin Becvar's classic Atlas of the Heavens (1962) shows the dust cloud extending almost as far east as my impression.
The dust cloud, from the Sahara in North Africa, will affect parts of the country throughout the weekend.
A thick dust cloud from Syria has settled over parts of Cyprus and is expected to last another day or so.
Identifying this permanent dust cloud engulfing the moon was a nice gift from this mission," lead study author Mihaly Horanyi, a professor of astrophysics at the University of Colorado, said in a press release.
People who were watching were at a safe distance and were advised to turn their backs when the dust cloud reached them.
WE'RE COUGH Onlookers head away from the demolition site to escape the massive dust cloud blowing over the streets
The dust cloud is then ignited by a flame from a 10 kJ energy source.
Our goal is to do a feasibility study of whether it would be possible to distinguish the light emission of the planet from the background emission of the dust cloud through direct observation," Hinz said.
The dust cloud has wreaked havoc with European air traffic control and more
Chester Road residents who were some of those hit by the dust cloud wanted to know why it had happened again, and if there was any threat to health.
Powder samples are dispersed in the tube and attempts are made to ignite the resultant dust cloud by a constant electrical arc ignition source.
But watching the twin towers in New York dissolve into a huge dust cloud on 9-11, claiming the lives of thousands of innocent people, she realized she hadn't even scratched the surface of giving back to her adopted country.