Too much melt, and the waters burst past unstable walls of rock and silt called moraines&#0151;potentially causing mudslides.
(the waters; burst; past unstable walls of rock and silt called moraines&#0151) (past unstable walls of rock and silt; called; moraines&#0151)
the waters past unstable walls of rock and silt
burst called
past unstable walls of rock and silt called moraines&#0151
moraines&#0151