For 20 points, identify these kinds of eruptions that occurred most famously at Lake Mounon in 1984 and more devastatingly at Lake Nyos in 1986, eruptions of enormous clouds of CO2 gas.
J.C. Sabroux coined the term for this event, which may have helped create the fossil trove at the Messel pit. Tietze outlined the mechanics of this term while Villevieille suggested a possible preventive measure, the self-siphoning autonomous soda fountain. Non-nucleated CO2-saturated water in a meromitic environment is the major cause and lava flows from the 2002 Nyriagongo eruption were seen as a threat to cause one of these, but a lack of saturation at depth prevented another disaster like ones that had occured earlier in the Oku volcanic field. The most famous instance of this event resulted in an eighty foot high tsunami, a three hundred foot fountain of foam, and the destruction of the villages of Cha, Kam, and Subum as well as almost all life in the nearby valleys. For 20 points, identify these kinds of eruptions that occurred most famously at Lake Mounon in 1984 and more devastatingly at Lake Nyos in 1986, eruptions of enormous clouds of CO2 gas.
J.C. Sabroux coined the term for this event, which may have helped create the fossil trove at the Messel pit.
{Limnic} Eruption (Prompt on {Lake Overturn}) [{Yeah}, {this} is {hard}, {although} after {Nyos} it {should probably} be {easier.}]