A large 4 x 7 x 35 m block from a lava flow was transported about 900 m within a pyroclastic flow down the NE flank of Arenal on 5 September 2003. The flows were produced by lava flow fronts collapsing, descending to about 800 m elevation. Geologist Erick Fernandez from OVSICORI-UNA measures the dimensions of the block.

Photo by Eliecer Duarte, 2003 (OVSICORI-UNA).

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Galleries: Fieldwork | Pyroclastic Flows

Keywords: deposit | pyroclastic flow | pyroclastic density current (PDC) | block | vegetation | environmental impact | volcanologist | field work

Arenal