The surface of many soils in northern areas show distinctive patterns produced by complex processes of freezing and thawing, which cause frost heaving and sorting of debris; although permafrost is not essential to these formations, it is usually present.
They're loud, annoying, and collect all sorts of debris as they run, whirring endlessly and eventually failing.
Such an event would have left its mark in all sorts of debris left over from that time, but analyses for geochemical impact markers such as the exotic element iridium, which is delivered only by comets and asteroids—have come up empty-handed.
My vacuum has gone under the tongs three times in the past six months, each time after trying to gobble down the sort of routine debris -- a small marble, a Canadian penny, spilled glitter -- that I expect a vacuum to digest without comment.
This is an efficient liquefaction of the solid biomass in a liquid product that can be regarded as a sort of molecular debris that contains thermal degradation products from all the main biomass parts.
He characterised these processes as scraping, scratching, sorting piles of debris into heaps, etc.
Once we have better data about what kind of debris is out there, we can develop all sorts of products and businesses to take advantage of the data and build better systems to avoid it.
Prior to May 18, Kehoe had loaded the back seat of his truck with all sorts of metal debris capable of producing shrapnel during an explosion.
Exceptionally robust connections between columns and beams as well as unexpectedly sturdy floor bracing allowed for that sort of rerouting when debris knocked out a structural column in the Bankers Trust Building at 130 Liberty Street, Mr. Scarangello said.
That is left to the workers who came to this place, day after day, at their peak sorting through 7,000 tons of debris every 24 hours.
