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☆☆☆☆☆The thermosphere is the first layer of the atmosphere where there are enough heavier molecules (oxygen) to absorb a significant anount of the Sun's radiation. Below the thermosphere, much of the heat is dissipated by convective currents.
Although technically "hot", the gas in the thermosphere is so thin that it can pass little heat to other molecules, and loss of heat by radiation would still cool objects in this part of the atmosphere.
the sun's radiation strikes it first
Chlorofluorocarbons damage the protective ozone layer.
evaporation
The alluvial silt that covers the land during flooding increases its fertility. This is in addition to the ready supply of fresh water required for any large societal group.
Aurora Borealis is caused by particles hitting earth's atmosphere thermosphere and they are stopped, so they give of their energy in the "Northern Lights" or Aurora Borealis.
Probably the best condition for fossil creation/preservation would be aqueous catastrophism(ie... flood), stratum deposited in rapid succession. Quick coverage of plant or life form would/do present terrific fossils.
The answer of 'Quick freezing' is not so likely. I can't think of anywhere there would suddenly be 'flash freezing' upon our planet. Life forms would have a chance to move away from such conditions of cold and plants would die out. Although death within a cold temperature area would lend to good preservation of a life form.
"Quick Freezing"
yes, they travel fast.
Present.
