A mudflow is a flow of mud that carry's a mixture of ash and water that has other material like big rocks. Looks cement-like.
this, the local residents from the earliest episodes. As the impact of. "Mudflows of Mount Shasta." College of the Siskiyous | Home . N.p., n.d. Web. 12 Dec. 2012. <http://www.siskiyous.edu/shasta/env/glacial/mud.htm>.