Map showing inventory and regional susceptibility for Holocene debris flows and related fast moving landslides in the conterminous United States

These data are intended for geographic display and analysis at the national
level, and for large regional areas. It is not intended for hazard evaluation
or other site-specific work, and should not be used for such. It can be used
to determine where debris flow processes may be a problem and where additional
information and investigation are warranted. Although the digital form of the
data removes the constraint imposed by the scale of a paper map, the detail and
accuracy inherent in map scale are also present in the digital data. The fact
that this database was edited at a scale of 1:2,500,000 means that higher
resolution information is not present in the data. Plotting at scales larger
than 1:2,500,000 will not yield greater real detail, and it may reveal
fine-scale irregularities below the intended resolution of the database.
Similarly, where this database is used in combination with other data of higher
resolution, the resolution of the combined output will be limited by the lower
resolution of these data. No responsibility is assumed by the U.S. Geological
Survey in the use of these data.

Debris flows, debris avalanches, mud flows and lahars are fast-moving
landslides that occur in a wide variety of environments throughout the world.
They are particularly dangerous to life and property because they move quickly,
destroy objects in their paths, and can strike with little warning. The
purpose of this map is to show where debris flows have occurred in the
conterminous United States and where these slope movements might be expected in
the future.