1. A land-form of roughly triangular shape, and with one side (the dip slope) that is both steep and uniform. It is formed between two adjacent valleys that cut through a hogback ridge roughly at right angles to its trend. It is a common land-form along the eastern front of the Rocky Mountains, USA.
2. Applied to clasts that have been shaped by glacial erosion at the base of sliding ice. Typically, they show a distinctive ‘bullet’ form, with one end plucked and the other streamlined, and may vary in size from a few centimetres to many metres.
"flat-iron." A Dictionary of Earth Sciences. . Encyclopedia.com. (September 20, 2018). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/flat-iron
"flat-iron." A Dictionary of Earth Sciences. . Retrieved September 20, 2018 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/flat-iron