I didn't figure this out all by myself,that would be impossible! So here a for websites and links I used:
http://en.wikipedia.org/wiki/Lahar
http://volcanoes.usgs.gov/hazards/lahar/index.php
http://www.geo.mtu.edu/volcanoes/hazards/primer/lahar.html
http://en.wikipedia.org/wiki/Mudslide
http://vulcan.wr.usgs.gov/Glossary/Lahars/description_lahars.html
http://www.thefreedictionary.com/mudflows
http://en.wikipedia.org/wiki/Landslide
http://landslides.usgs.gov/
http://emergency.cdc.gov/disasters/landslides.asp
http://en.wikipedia.org/wiki/Avalanche
http://www.google.com/images?q=avalanche&hl=en&gbv=2&gs_l=heirloom-hp.3..5j0l7j0i5l2.214590.216637.0.216855.6.6.0.0.0.0.172.641.5j1.6.0...0.0...1c.1.v0wHiLU7_xw&sa=X&oi=image_result_group
Go to these links and will help even more than I did or didn't !
http://en.wikipedia.org/wiki/Lahar
http://volcanoes.usgs.gov/hazards/lahar/index.php
http://www.geo.mtu.edu/volcanoes/hazards/primer/lahar.html
http://en.wikipedia.org/wiki/Mudslide
http://vulcan.wr.usgs.gov/Glossary/Lahars/description_lahars.html
http://www.thefreedictionary.com/mudflows
http://en.wikipedia.org/wiki/Landslide
http://landslides.usgs.gov/
http://emergency.cdc.gov/disasters/landslides.asp
http://en.wikipedia.org/wiki/Avalanche
http://www.google.com/images?q=avalanche&hl=en&gbv=2&gs_l=heirloom-hp.3..5j0l7j0i5l2.214590.216637.0.216855.6.6.0.0.0.0.172.641.5j1.6.0...0.0...1c.1.v0wHiLU7_xw&sa=X&oi=image_result_group
Go to these links and will help even more than I did or didn't !