Data from the Sharad (SHAllow RADar) instrument (on Mars Reconnaissance Orbiter), document that some of these glacial-like features, which you find at Mars' mid-latitudes, have a significant volume of ice left below a surface of rock debris.

BBC: Q&A: Liquid water on Mars

There, mudslides and raging rivers swept away shantytowns perched on steep slopes of the lush Avila mountain and left tall buildings marooned in a sea of rock-hard debris.

BBC: News Online

One special visitor's planned arrival to Fire Island is creating a pressing deadline for the cleanup of tons of rotting wood, sheet rock, old refrigerators and other Superstorm Sandy debris from the popular vacation destination east of New York City.

WSJ: NY's Fire Island debris effort faces bird deadline

Engineers have removed about 40 tonnes of debris in a bid to stabilise the rock face.

BBC: Ironbridge Jiggers Bank road remains closed

Before the latest landslide, engineers had removed about 40 tonnes of debris in a bid to stabilise the rock face.

BBC: Ironbridge Jiggers Bank road remains closed