Two kinds of volcanic glass in the 1809 ice layer: andesite in Antarctica, dacite in the Yukon
Yalcin et al. 2006 found dacitic glass in the 1809 layer of the Eclipse icefield core in the Yukon, chemically different from the andesitic glass found earlier in South Pole and Dome C cores. An older study had matched the Antarctic glass to Cosiguina in Nicaragua, a match that later work does not support. Two glass types mean two sources, unless one eruption produced both.
How it connects
This clue from nature argues against
Hobbyist idea: Tambo Quemado in the Bolivian Andes was the 1808 volcano ice glass is andesite and dacite; Tambo Quemado looks rhyolitic
This clue from nature supports this hunch
Hobbyist idea: Putana in Chile was one of several eruptions behind the 1809 signal supports a cluster of eruptions, not Putana specifically
This clue from nature is a clue for
1808 mystery eruption
This clue from nature we read it in
Yalcin et al. 2006, Ice core evidence for a second volcanic eruption around 1809 in the Northern Hemisphere, Geophysical Research Letters
This clue from nature is where we read about
Look west of the Americas for December 1808
This clue from nature came from this step
Started the 1808 mystery eruption