30 March 2010
Is a lavafall a landslide?
Posted by Dave Petley
The Mountain Cat Geology blog has an astonishing image of a lavafall in Iceland following the recent eruption (click on the image for a better view in a new window):
I wonder whether this is technically a landslide, given that it is a mass movement consisting entirely of rock?
If a lava fall is to be grouped in mass movements of any such, I believe it would most likely resemble a flow. This is if you agree that the displaced matter, in this case, lava; resembles the mechanics of a viscous liquid.
Fun idea, but I think "rock" by definition is a coherent solid… lava, falling or otherwise, is neither.