Köfelsit#
Koefelsit, porous and strikingly light stone which can only be found in Koefels (Tirol) in the Oetz valley. Originally thought to be a kind of pumice stone, it is now seen as a melting product, which was probably created by the fall of a large meteorite or by frictional heat on the slip planes due to a mountain slide.
Literature#
R. Surenian, Das Koefelsit-Vorkommen im Oetztal, Tirol, in: Mineralogische Rundschau, 1994.