20. Iceland, The Main Character
There’s a bit of debate on whether the darkening fog originated from North America or Iceland; and while there is good evidence for North America, Iceland seems to be on the tips of most researchers’ tongues.
The flecks of volcanic glass found were run under x-rays and they matched the glass particles in an ice core from Greenland, which in turn matched the particles in the volcanic rocks from Iceland.
Geoscientist, David Lowe, said that the similarities between the particles strongly suggested that their source was the volcanic eruption in Iceland.
Another motivation for Iceland is the fact that it is much closer to Central and Northwest Europe than North America, therefore impacts from a volcanic eruption would have lasting impacts like causing cool weather abruptly.