MICHAEL MANGA

Neat stuff in the Field

Lassen, 2009

Lassen produced California's most recent volcanic eruption, in 1915. In September 2009 we visited in order to study magma mingling and mixing, characterize the oxidation of fall deposits in order to better constrain eruptive history, and characterize the evolution of clast roundness as particles are transported in pyroclastic density currents.


lower
Lassen in the background


lower
A bomb, with cinder cone in the background


lower
Oxidized pumice that fell on a still-hot lava flow


lower
Enclaves in dacite


lower
Banded pumice


lower
Steam vent


Return to the field home page

Return to Michael's home page