Effects
The object came in from the northeast, as bright as the Sun. The object hit ground at the Northern Basin, creating a mountain of fire about 10 kilometers wide and 50 kilometers long, and scattered off pieces that went downrange to form the Twins and the Drop. The fireball incinerated all life downrange in a firestorm with a parabolic-shaped footprint that created hurricane-force winds, erasing the butterfly-shaped pattern of debris characteristic of such low-angle strikes.
The object was thought to be a "carbonaceous chondritic" asteroid, largely made up of simple carbon compounds and resembling something like a big lump of soot. The impact probably released huge clouds of toxic carbon monoxide that killed off wildlife in the area, assisted by heavy concentrations of toxic nitric oxides created through ionization by the object's fiery passage through the atmosphere. It is likely the impact resulted in serious atmospheric effects and may have even had a short-term effect on global climate.
Read more about this topic: Rio Cuarto Craters
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—Frances Wright (1795–1852)
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—Henry David Thoreau (1817–1862)
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—David Hume (1711–1776)