is usually easily eroded. If the mass is
big enough, the momentum and
speed
can become sufficiently large to snatch up
bridges,
buildings or other
infrastructure and therefore
cause large
amount of damages.
One of the most infamous hazard
caused by lahars occurred
after
the eruption in Pinatubo in 1991. https://pubs.usgs.gov/fs/1997/fs114-
97/
Another example is the devastating lahar
/volcanoes/volcanic-hazards/landslides/